diff --git a/src/main.c b/src/main.c
index 9c4a6eb..230028c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <stdlib.h>
 #include "sync/types.h"
 #include "sync/lexer.h"
 
@@ -6,17 +7,35 @@ static void print_token(Token token) {
     printf("Token: %-15s | Text: '%.*s'\n",
         (const char *[]){
             "EOF", "IDENTIFIER", "NUMBER", "OPERATOR",
-            "LPAREN", "RPAREN", "SEMICOLON", "UNKNOWN"
+            "LPAREN", "RPAREN", "SEMICOLON", "LBRACE",
+            "RBRACE", "LBRACKET", "RBRACKET"
         }[token.type],
         (int)token.length, token.start
     );
 }
 
 int main(void) {
-    const char *source = "sum = a + b123;\nprint(sum);";
+    const char *filename = "test/example1.zn";
+    FILE *file = fopen(filename, "rb");
+    if (!file) {
+        fprintf(stderr, "Failed to open file: %s\n", filename);
+        return 1;
+    }
+    fseek(file, 0, SEEK_END);
+    long filesize = ftell(file);
+    fseek(file, 0, SEEK_SET);
+    char *source = malloc(filesize + 1);
+    if (!source) {
+        fprintf(stderr, "Failed to allocate memory.\n");
+        fclose(file);
+        return 1;
+    }
+    fread(source, 1, filesize, file);
+    source[filesize] = '\0';
+    fclose(file);
 
     Lexer lexer;
-    lexer_init(&lexer, "<stdin>", source);
+    lexer_init(&lexer, filename, source);
 
     TokenResult result;
     do {
@@ -28,5 +47,6 @@ int main(void) {
         }
     } while (result.type != SYNC_ERROR && result.result.type != TOKEN_EOF);
 
+    free(source);
     return 0;
 }
diff --git a/test/example1.zn b/test/example1.zn
new file mode 100644
index 0000000..428220a
--- /dev/null
+++ b/test/example1.zn
@@ -0,0 +1,47 @@
+
+static void print_token(Token token) {
+    //printf("Token: %-15s | Text: '%.*s'\n",
+        (const char *[]){
+            //"EOF", "IDENTIFIER", "NUMBER", "OPERATOR",
+            //"LPAREN", "RPAREN", "SEMICOLON", "UNKNOWN"
+        }[token.type],
+        (int)token.length, token.start
+    );
+}
+
+int main(void) {
+    //const char *filename = "test/example1.zn";
+    FILE *file = fopen(filename, //"rb");
+    if (!file) {
+        //fprintf(stderr, "Failed to open file: %s\n", filename);
+        return 1;
+    }
+    fseek(file, 0, SEEK_END);
+    long filesize = ftell(file);
+    fseek(file, 0, SEEK_SET);
+    char *source = malloc(filesize + 1);
+    if (!source) {
+        //fprintf(stderr, "Failed to allocate memory.\n");
+        fclose(file);
+        return 1;
+    }
+    fread(source, 1, filesize, file);
+    source[filesize] = //'\0';
+    fclose(file);
+
+    Lexer lexer;
+    lexer_init(&lexer, filename, source);
+
+    TokenResult result;
+    do {
+        result = lexer_next(&lexer);
+        if (result.type == SYNC_RESULT) {
+            print_token(result.result);
+        } else {
+            //fprintf(stderr, "Error: %s\n", result.error.message);
+        }
+    } while (result.type != SYNC_ERROR && result.result.type != TOKEN_EOF);
+
+    free(source);
+    return 0;
+}