diff --git a/frame.cpp b/frame.cpp
index 5cee9d5..efdef40 100644
--- a/frame.cpp
+++ b/frame.cpp
@@ -6,6 +6,7 @@
 #include <iostream>
 #include <fstream>
 #include <sstream>
+#include <cstring>
 
 enum ExitStatus {
     BAD_ARGUMENT = 1,
@@ -30,15 +31,6 @@ int main(int argc, char** argv) {
     jump_table << "#include \"macro.h\"" << std::endl;
     jump_table << "#include <avr/io.h>" << std::endl;
 
-    for (int current_image = 0; current_image < images; ++current_image) {
-        jump_table << ".global line_jump_table_" << current_image << std::endl;
-        jump_table << "line_jump_table_" << current_image << ":" << std::endl;
-        for (int i = 0; i < 256; ++i) {
-            jump_table << '\t' << "jmp line_" << current_image << "_" << i << std::endl;
-        }
-    }
-
-
     char** image = new char*[images];
 
     for (int current_image = 0; current_image < images; ++current_image) {
@@ -87,7 +79,29 @@ int main(int argc, char** argv) {
 
         infile.close();
 
+        jump_table << ".global line_jump_table_" << current_image << std::endl;
+        jump_table << "line_jump_table_" << current_image << ":" << std::endl;
+
         for (int y = 0; y < height; ++y) {
+
+            int diff = 1;
+
+            for (int other_image = 0; other_image <= current_image; ++other_image) {
+                for (int other_y = 0; other_y < height && other_y < y; ++other_y) {
+                    diff = memcmp(&(image[current_image][y * width + 0]), &(image[other_image][other_y * width + 0]), width);
+                    if (diff == 0) {
+                        jump_table << '\t' << "jmp line_" << other_image << "_" << other_y << std::endl;
+                        goto nested_loop_end;
+                    }
+                }
+            }
+
+nested_loop_end:
+
+            if (diff == 0)
+                continue;
+
+            jump_table << '\t' << "jmp line_" << current_image << "_" << y << std::endl;
             asm_code << "line_" << current_image << "_" << y << ":" << std::endl;
 
             int count = 0;