diff --git a/src/extstring.c b/src/extstring.c
index ba7adcb..25c941f 100644
--- a/src/extstring.c
+++ b/src/extstring.c
@@ -2,53 +2,81 @@
 #include "extstring.h"
 
 void es_addsymbol(tExtstring* string, char symbol) {
+
 	if (string == NULL)
 		return;
+
 	tExtstring* ptr = string;
+
 	while (ptr->next != NULL) {
 		ptr = ptr->next;
 	};
+
 	ptr->next = malloc(sizeof(tExtstring));
 	ptr->next->symbol = symbol;
 	ptr->next->next = NULL;
+
 	return;
+
 }
 
 int es_size(tExtstring* string) {
+
 	int size = 0;
+
 	tExtstring* ptr = string;
+
 	for (; ptr != NULL; size++) {
 		ptr = ptr->next;
 	}
+
 	return size;
 }
 
 void es_free(tExtstring* string) {
+
 	if (string->next == NULL) {
+
 		free(string);
+
 		return;
+
 	}
+
 	tExtstring* ptr = string;
 	tExtstring* nextptr = ptr->next;
+
 	while (ptr->next != NULL) {
+
 		nextptr = ptr->next;
 		free(ptr);
 		ptr = nextptr;
+
 	}
+
 	free(ptr);
+
 }
 
 char* es_tostring(tExtstring* string) {
+
 	tExtstring* ptr = string;
+
 	int size = es_size(string) + 1;
+
 	char* cstring = malloc(size);
+
 	for (int i = 0; i != size; i++) {
+
 		if (ptr != NULL) {
 			cstring[i] = ptr->symbol;
 			ptr = ptr->next;
 		}
+
 		else
 			cstring[i] = 0;
 	}
+
 	return cstring;
+
 }
diff --git a/src/extstring.h b/src/extstring.h
index 6c77c33..0c5dd0c 100644
--- a/src/extstring.h
+++ b/src/extstring.h
@@ -3,7 +3,11 @@ typedef struct Extstring {
 	struct Extstring* next;
 } tExtstring;
 
+
 void es_addsymbol(tExtstring* string, char symbol);
+
 int es_size(tExtstring* string);
+
 void es_free(tExtstring* string);
+
 char* es_tostring(tExtstring* string);
diff --git a/src/main.c b/src/main.c
index 3dd83c5..82ca480 100644
--- a/src/main.c
+++ b/src/main.c
@@ -7,6 +7,7 @@
 #include "process.h"
 
 int main(int argc, char *argv[]) {
+
 	FILE *file;
 	if (argc != 2) {
 		fprintf(stderr,
@@ -14,23 +15,30 @@ int main(int argc, char *argv[]) {
 			"%s FILENAME\n", argv[0]);
 		return 1;
 	}
+
 	file = fopen(argv[1],"r");
 	if (file == NULL) {
 		fprintf(stderr,"Unable to open file.\n");
 		return 1;
 	}
+
 	tSyntaxElement* code = parse(file);
 	fclose(file);
+
 	if (code == NULL) {
 		fprintf(stderr, "Error during parsing.\n");
 		return 1;
 	}
+
 	printf("Parsed: \n");
 	printtree(code,1);
+
 	printf("\nProcessed: \n");
 	process(code, NULL);
 	printtree(code,1);
+
 	se_free(code);
 	code = NULL;
+
 	return 0;
 }
diff --git a/src/parser.c b/src/parser.c
index eb44a5e..a0653f2 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -3,130 +3,190 @@
 #include <stdbool.h>
 #include <ctype.h>
 
-#ifdef DEBUG
-#include "printtree.h"
-#endif
 #include "parser.h"
 #include "extstring.h"
 
+#ifdef DEBUG
+	#include "printtree.h"
+#endif
+
 tSyntaxElement* parse(FILE* file) {
+
 	tSyntaxElement* syntaxtree = se_create();
 	tSyntaxElement* syntaxtreestart = syntaxtree;
 	syntaxtree->type = NEWTREE;
+
 	char symbol;
 	bool intree = false;
 	bool incomment = false;
 	bool instring = false;
 	bool intoken = false;
+
 	tExtstring* exttoken = NULL;
 	tExtstring* extstring = NULL;
+
 	while (1) {
 		symbol = fgetc(file);
+
 		#ifdef DEBUG
-		if (!isspace(symbol))
-			printf("In parsing. Current symbol: %c\n", symbol);
-		else
-			printf("In parsing. Current symbol: %d\n", symbol);
-		printtree(syntaxtreestart, 1);
+
+			if (!isspace(symbol))
+				printf("In parsing. Current symbol: %c\n", symbol);
+			else
+				printf("In parsing. Current symbol: %d\n", symbol);
+
+			printtree(syntaxtreestart, 1);
+
 		#endif
+
 		if (feof(file))
 			break;
+
 		if (incomment) {
 			if (symbol == '\n')
 				incomment = false;
 			continue;
 		}
+
 		if (instring) {
 			if (symbol == '"') {
+
 				if (extstring == NULL) {
 					extstring = malloc(sizeof(tExtstring));
 					extstring->next = NULL;
 				}
+
 				instring = false;
+
 				syntaxtree->type = STRING;
 				char* string = es_tostring(extstring);
 				syntaxtree->content.string = string;
+
 				es_free(extstring);
 				extstring = NULL;
+
 			} else {
+
 				if (extstring == NULL) {
+
 					extstring = malloc(sizeof(tExtstring));
 					extstring->symbol = symbol;
 					extstring->next = NULL;
+
 					continue;
 				}
+
 				es_addsymbol(extstring, symbol);
 			}
 			continue;
 		}
 		if (intoken) {
 			if (isspace(symbol) || symbol == '(' || symbol == ')') {
+
 				intoken = false;
+
 				syntaxtree->type = TOKEN;
 				char* string = es_tostring(exttoken);
 				syntaxtree->content.string = string;
+
 				es_free(exttoken);
 				exttoken = NULL;
+
 			} else {
+
 				es_addsymbol(exttoken, symbol);
+
 				continue;
 			}
 		}
+
 		if (isspace(symbol)) 
 			continue;
+
 		if (intree) {
 			switch (symbol) {
+
 				case '(':
+
 					syntaxtree = se_next(syntaxtree);
 					syntaxtree->type = TREE;
+
 					syntaxtree = se_bottom(syntaxtree);
 					syntaxtree->type = NEWTREE;
+
 					break;
+
 				case ')':
+
 					syntaxtree = syntaxtree->top;
+
 					if (syntaxtree->top == NULL)
 						intree = false;
 					break;
+
 				case ';':
+
 					incomment = true;
 					continue;
+
 				case '"':
+
 					syntaxtree = se_next(syntaxtree);
 					instring = true;
 					continue;
+
 				default:
+
 					syntaxtree = se_next(syntaxtree);
+
 					exttoken = malloc(sizeof(tExtstring));
 					exttoken->symbol = symbol;
 					exttoken->next = NULL;
+
 					intoken = true;
 					break;
 			}
 			continue;
+
 		} else {
 			switch (symbol) {
+
 				case ')':
+
 					fprintf(stderr, "Unbalanced brackets.\n");
 					return NULL;
+
 				case ';':
+
 					incomment = true;
 					continue;
+
 				case '(':
+
 					intree = true;
+
 					syntaxtree = se_next(syntaxtree);
 					syntaxtree->type = TREE;
+
 					syntaxtree = se_bottom(syntaxtree);
 					syntaxtree->type = NEWTREE;
+
 					continue;
+
 				default:
+
 					fprintf(stderr, "Expression outside of brackets.\n");
 					return NULL;
 			}
 		}
 	}
+
 	if (intree) {
+
 		fprintf(stderr, "Unexpected EOF.\n");
 		return NULL;
+
 	}
+
 	return syntaxtreestart;
 }
diff --git a/src/printtree.c b/src/printtree.c
index 3271a71..9aab861 100644
--- a/src/printtree.c
+++ b/src/printtree.c
@@ -5,29 +5,47 @@
 #include "printtree.h"
 
 void printtree(tSyntaxElement* syntaxtree, int depth) {
+
 	if (syntaxtree == NULL)
 		return;
+
 	for (int i = 1; i <= depth; i++)
 		putc(' ',stdout);
+
 	switch (syntaxtree->type) {
+
 		case TREE:
+
 			printf("TREE\n");
 			printtree(syntaxtree->content.syntax, depth + 1);
+
 			break;
+
 		case TOKEN:
+
 			printf("TOKEN: %s\n", syntaxtree->content.string);
 			break;
+
 		case STRING:
+
 			printf("STRING: %s\n", syntaxtree->content.string);
 			break;
+
 		case NONE:
+
 			printf("NONE\n");
 			break;
+
 		case NEWTREE:
+
 			printf("NEWTREE\n");
 			break;
+
 	}
+
 	if (syntaxtree->next != NULL)
 		printtree(syntaxtree->next, depth);
+
 	return;
+
 }
diff --git a/src/printtree.h b/src/printtree.h
index 27221de..3dc8798 100644
--- a/src/printtree.h
+++ b/src/printtree.h
@@ -1,2 +1,3 @@
 #include "parser.h"
+
 void printtree(tSyntaxElement*, int);
diff --git a/src/process.c b/src/process.c
index c4ec622..e7c2989 100644
--- a/src/process.c
+++ b/src/process.c
@@ -6,76 +6,124 @@
 #include "process.h"
 
 bool replace(tSyntaxElement* tree, tProcessingData* pdata) {
+
 	tProcessingData* pd = pdata;
+
 	bool didreplace = false;
+
 	while (1) {
+
 		if (pd->data.replace.replacethis == NULL)
 			break;
+
 		if (tree->type == TOKEN)
+
 			if (strcmp(tree->content.string, pd->data.replace.replacethis) == 0) {
+
 				didreplace = true;
+
 				free(tree->content.none);
+
 				tSyntaxElement* clone = se_clone_no_next(pd->data.replace.replacewiththis, tree);
 				tree->content = clone->content;
 				tree->type = clone->type;
+
 			}
+
 		if (pd->prev != NULL)
 			pd = pd->prev;
-		else
-			break;
+
+		else break;
+
 	}
+
 	return didreplace;
+
 }
 
 bool process_find(tSyntaxElement* tree, tProcessingData** p_pdata) {
+
 	tProcessingData* pd = *p_pdata;
+
 	bool deffound = false;
+
 	if (se_istraversable(tree))
+
 		if (tree->content.syntax->type == TOKEN &&
 		    tree->content.syntax->next != NULL &&
 		    tree->content.syntax->next->next != NULL) {
+
 			tSyntaxElement* token = tree->content.syntax;
+
 			if (strcmp(token->content.string,"def") == 0) {
+
 				char* replacethis = token->next->content.string;
+
 				tSyntaxElement* replacewiththis = token->next->next;
+
 				tProcessingData* npd = malloc(sizeof(tSyntaxElement));
+
 				npd->type = REPLACE;
 				npd->data.replace.replacethis = replacethis;
 				npd->data.replace.replacewiththis = replacewiththis;
 				npd->prev = pd;
+
 				*p_pdata = npd;
+
 				deffound = true;
+
 			}
+
 		}
+
 	return deffound;
+
 }
 
+
 void process(tSyntaxElement* tree, tProcessingData* pdata) {
+
 	tProcessingData* pd = pdata;
+
 	bool deffound = false;
+
 	tProcessingData* firstpd = NULL;
+
 	if (pd == NULL) {
+
 		pd = calloc(1,sizeof(tProcessingData));
 		firstpd = pd;
+
 	}
+
 	deffound = process_find(tree, &pd);
+
 	if (tree->next != NULL) {
 		process(tree->next, pd);
 	}
+
 	if (!deffound) {
-		if (se_istraversable(tree)) {
+
+		if (se_istraversable(tree))
 			process(tree->content.syntax, pd);
-		}
+
 		switch (pd->type) {
+
 			case REPLACE:
 				replace(tree, pd);
 				break;
-			case FUNCTION:
+
+			case FUNCTION: // TODO
 				break;
+
 		}
+
 	}
+
 	if (pd != pdata)
 		free(pd);
+
 	if (firstpd != pd && firstpd != NULL)
 		free(firstpd);
+
 }
diff --git a/src/process.h b/src/process.h
index 51997f2..66e10ff 100644
--- a/src/process.h
+++ b/src/process.h
@@ -2,33 +2,45 @@
 #include "syntax.h"
 
 typedef enum {
+
 	REPLACE,
 	FUNCTION
+
 } tProcessingType;
 
 
 
 typedef struct {
+
 	char* replacethis;
 	tSyntaxElement* replacewiththis;
+
 } tProcessingReplace;
 
 typedef struct {
+
 	char** args;
 	tSyntaxElement* body;
+
 } tProcessingFunction;
 
 
 
 typedef union {
+
 	tProcessingReplace replace;
 	tProcessingFunction function;
+
 } tuProcessingData;
 
 typedef struct ProcessingData {
+
 	struct ProcessingData* prev;
 	tProcessingType type;
 	tuProcessingData data;
+
 } tProcessingData;
 
+
+
 void process(tSyntaxElement*, tProcessingData*);
diff --git a/src/syntax.c b/src/syntax.c
index 673c72f..b59407b 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -4,94 +4,141 @@
 #include "syntax.h"
 
 bool se_istraversable(tSyntaxElement* syntaxtree) {
+
 	return syntaxtree->type == TREE && syntaxtree->content.syntax != NULL;
+
 }
 
 tSyntaxElement* se_create(void) {
+
 	tSyntaxElement* syntaxelement = malloc(sizeof(tSyntaxElement));
+
 	syntaxelement->type = NONE;
 	syntaxelement->content.none = NULL;
 	syntaxelement->next = NULL;
 	syntaxelement->top = NULL;
+
 	return syntaxelement;
 
 }
 
 tSyntaxElement* se_bottom(tSyntaxElement* syntaxelement) {
+
 	syntaxelement->content.syntax = se_create();
 	syntaxelement->content.syntax->top = syntaxelement;
+
 	return syntaxelement->content.syntax;
+
 }
 
 tSyntaxElement* se_next(tSyntaxElement* syntaxelement) {
+
 	if (syntaxelement->type != NEWTREE) {
+
 		syntaxelement->next = se_create();
 		syntaxelement->next->top = syntaxelement->top;
+
 		return syntaxelement->next;
-	} else {
+
+	} else
 		return syntaxelement;
-	}
+
 }
 
 void se_free(tSyntaxElement* syntaxtree) {
+
 	switch (syntaxtree->type) {
+
 		case NONE:
+
 			free(syntaxtree);
 			return;
+
 		case TREE:
+
 			if (syntaxtree->content.syntax != NULL) {
 				se_free(syntaxtree->content.syntax);
 			}
+
 			break;
+
 		default:
+
 			free(syntaxtree->content.none);
 			break;
+
 	}
+
 	if (syntaxtree->next != NULL) {
 		se_free(syntaxtree->next);
 	}
+
 	free(syntaxtree);
+
 }
 
 tSyntaxElement* se_clone(tSyntaxElement* syntaxelement, tSyntaxElement* newtop) {
+
 	tSyntaxElement* clone = NULL;
+
 	switch (syntaxelement->type) {
+
 		case TREE:
+
 			clone = se_create();
 			clone->type = TREE;
+
 			if (syntaxelement->content.syntax != NULL)
 				clone->content.syntax = se_clone(syntaxelement->content.syntax, clone);
+
 			if (syntaxelement->next != NULL)
 				clone->next = se_clone(syntaxelement->next, newtop);
+
 			break;
+
 		case TOKEN:
 		case STRING:
+
 			clone = se_create();
 			clone->type = syntaxelement->type;
+
 			clone->content.string = malloc(strlen(syntaxelement->content.string));
 			strcpy(clone->content.string, syntaxelement->content.string);
+
 			if (syntaxelement->next != NULL)
 				clone->next = se_clone(syntaxelement->next, newtop);
+
 			break;
+
 		case NONE:
 		case NEWTREE:
+
 			clone = se_create();
 			clone->type = syntaxelement->type;
 			clone->top = newtop;
+
 			if (syntaxelement->next != NULL)
 				clone->next = se_clone(syntaxelement->next, newtop);
+
 			break;
 	}
+
 	return clone;
 }
 
 tSyntaxElement* se_clone_no_next(tSyntaxElement* syntaxelement, tSyntaxElement* newtop) {
+
 	tSyntaxElement* se = malloc(sizeof(tSyntaxElement));
+
 	se->content = syntaxelement->content;
 	se->top = syntaxelement->top;
 	se->type = syntaxelement->type;
 	se->next = NULL;
+
 	tSyntaxElement* clone = se_clone(se, newtop);
+
 	free(se);
+
 	return clone;
+
 }
diff --git a/src/syntax.h b/src/syntax.h
index 74e7bf8..73e342d 100644
--- a/src/syntax.h
+++ b/src/syntax.h
@@ -1,34 +1,50 @@
 #ifndef SYNTAX_H
 #define SYNTAX_H
+
 #include <stdbool.h>
 
 enum SyntaxElementType {
+
 	NEWTREE,
 	TREE,
 	TOKEN,
 	STRING,
 	NONE
+
 };
 
 typedef union {
+
 	struct SyntaxElement* syntax;
 	char* string;
 	void* none;
+
 } tSyntaxContent;
 
 typedef struct SyntaxElement {
+
 	enum SyntaxElementType type;
 	tSyntaxContent content;
 	struct SyntaxElement* next;
 	struct SyntaxElement* top;
+
 } tSyntaxElement;
 
+
 void se_free(tSyntaxElement*);
+
 bool se_istraversable(tSyntaxElement*);
+
 tSyntaxElement* se_create(void);
+
 tSyntaxElement* se_init(void);
+
 tSyntaxElement* se_bottom(tSyntaxElement*);
+
 tSyntaxElement* se_next(tSyntaxElement*);
+
 tSyntaxElement* se_clone(tSyntaxElement*, tSyntaxElement*);
+
 tSyntaxElement* se_clone_no_next(tSyntaxElement*, tSyntaxElement*);
+
 #endif