#version 300 es
precision mediump float;

in vec4 vertColor;
in vec2 vertTexCoord;

out vec4 fragColor;
uniform vec4 color1;
uniform vec4 color2;
uniform float patternSize;

void main() {
	float colorMix = ((step(patternSize * 0.5, mod(vertTexCoord.x, patternSize)) * 2.0 - 1.0) * (step(patternSize * 0.5, mod(vertTexCoord.y, patternSize)) * 2.0 - 1.0) + 1.0) / 2.0;
	fragColor = vertColor * (color1 * (1.0 - colorMix) + color2 * colorMix);
}