Movmenet & duplication!

shaders/simple_shader.vert

@@ -3,9 +3,11 @@
 layout(location = 0) in vec2 position;
 layout(location = 1) in vec3 color;
 
-layout(location = 0) out vec3 fragColor;
+layout(push_constant) uniform Push {
+  vec2 offset;
+  vec3 color;
+} push;
 
 void main() {
-  gl_Position = vec4(position, 0.0, 1.0);
-  fragColor = color;
+  gl_Position = vec4(position + push.offset, 0.0, 1.0);
 }