diff --git a/src/lib.rs b/src/lib.rs
index 590b94c..979abad 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -50,8 +50,8 @@ pub fn add_tiles(game_data: String, image: String, prefix: String) -> String {
         for row in 0..rows {
             let mut pixels = Vec::with_capacity(64);
 
-            for x in (column * SD)..((column + 1) * SD) {
-                for y in (row * SD)..((row + 1) * SD) {
+            for y in (row * SD)..((row + 1) * SD) {
+                for x in (column * SD)..((column + 1) * SD) {
                     let pixel = image.get_pixel(x, y).to_rgb();
                     let total: u32 = (pixel[0] as u32 + pixel[1] as u32 + pixel[2] as u32) as u32;
                     // is each channel brighter than 128/255 on average?