diff --git a/www/shaders/segfault.glsl b/www/shaders/segfault.glsl
index 78e9766..358708b 100644
--- a/www/shaders/segfault.glsl
+++ b/www/shaders/segfault.glsl
@@ -357,13 +357,13 @@ float bloom(vec2 uv2) {
         * smoothstep(0., -SMOOTH*20., stdRS(uvC, -0.02)) * 0.5;
 }
 
-void main() {       
+void mainImage(out vec4 fragColor) {       
    	vec2 uv = vec2(gl_FragCoord.x, uResolution.y - gl_FragCoord.y);
    	vec2 uvT = ROWCOLS * FONT_SIZE * uv / uResolution.xy;
    	vec2 uvG = floor(ROWCOLS * uv / uResolution.xy);
-    vec2 uvC = gl_FragCoord.xy / uResolution;
+    vec2 uvC = gl_FragCoord/uResolution.xy;
         
-    vec2 uvNoise = uvC;
+    vec2 uvNoise = gl_FragCoord.xy / uResolution.xy;
     uvNoise = ceil(uvNoise * ROWCOLS) / ROWCOLS;
     
     float val;
@@ -381,6 +381,6 @@ void main() {
         val = pow(18.0, val) - 1.0; // TODO: try changing 18.0 to 200.0 and you'll notice some pretty changes :)
     }
       
-	gl_FragColor = vt220Font(uvT - uvG * FONT_SIZE, val) * PHOSPHOR_COL + BG_COL;
+	fragColor = vt220Font(uvT - uvG * FONT_SIZE, val) * PHOSPHOR_COL + BG_COL;
 }