diff --git a/project/code/Images/GifDecoder.cs b/project/code/Images/GifDecoder.cs
index e389a55..d462625 100644
--- a/project/code/Images/GifDecoder.cs
+++ b/project/code/Images/GifDecoder.cs
@@ -278,45 +278,28 @@ public class GifDecoder
                 return bytes;
             }
 
-            var pass1Count = (int)Math.Ceiling(Height / 8.0f);
-            var pass2Count = (int)Math.Ceiling((Height - 4) / 8.0f);
-            var pass3Count = (int)Math.Ceiling((Height - 2) / 4.0f);
-            var pass4Count = (int)Math.Ceiling((Height - 1) / 2.0f);
-
+            var pass = 0;
+            var inc = 8;
+            var y = 0;
             var indicesOffset = 0;
             var bytesPerRow = Width * 4;
-            for (var i = 0; i < pass1Count; i++)
+            for (var i = 0; i < Height; i++)
             {
-                bytesIdx = 8 * i * bytesPerRow;
+                bytesIdx = y * bytesPerRow;
                 for (var x = 0; x < Width; x++)
                 {
                     WritePixelBytes(bytesIdx + x * 4, _pixelIndices[indicesOffset++]);
                 }
-            }
-            for (var i = 0; i < pass2Count; i++)
-            {
-                bytesIdx = (4 + 8 * i) * bytesPerRow;
-                for (var x = 0; x < Width; x++)
+
+                y += inc;
+                if (y >= Height)
                 {
-                    WritePixelBytes(bytesIdx + x * 4, _pixelIndices[indicesOffset++]);
-                }
-            }
-            for (var i = 0; i < pass3Count; i++)
-            {
-                bytesIdx = (2 + 4 * i) * bytesPerRow;
-                for (var x = 0; x < Width; x++)
-                {
-                    WritePixelBytes(bytesIdx + x * 4, _pixelIndices[indicesOffset++]);
-                }
-            }
-            for (var i = 0; i < pass4Count; i++)
-            {
-                bytesIdx = (1 + 2 * i) * bytesPerRow;
-                for (var x = 0; x < Width; x++)
-                {
-                    WritePixelBytes(bytesIdx + x * 4, _pixelIndices[indicesOffset++]);
+                    pass += 1;
+                    y = (int)(8 / Math.Pow(2, pass));
+                    inc = y * 2;
                 }
             }
+
             return bytes;
         }
     }