diff --git a/music.js b/music.js
index 9d74cbb..c98fb82 100755
--- a/music.js
+++ b/music.js
@@ -3,22 +3,22 @@ function draw_one_frame(vocal, drum, bass, other) {
   rectMode(CENTER);
 
   let bar_spacing = width/5;
-  let bar_height = height/2;
   let bar_width = width/6;
+  let bar_pos_y = height/2;
 
   // vocal bar is red
   fill(200, 0, 0);
-  rect(1 * bar_spacing, bar_height, bar_width, vocal);
+  rect(1 * bar_spacing, bar_pos_y, bar_width, 4 * vocal);
 
   // drum bar is green
   fill(0, 200, 0);
-  rect(2 * bar_spacing, bar_height, bar_width, drum);
+  rect(2 * bar_spacing, bar_pos_y, bar_width, 4 * drum);
 
   // bass bar is blue
   fill(0, 0, 200);
-  rect(3 * bar_spacing, bar_height, bar_width, bass);
+  rect(3 * bar_spacing, bar_pos_y, bar_width, 4 * bass);
 
   // other bar is white
   fill(200, 200, 200);
-  rect(4 * bar_spacing, bar_height, bar_width, other);
+  rect(4 * bar_spacing, bar_pos_y, bar_width, 4 * other);
 }