#version 400 out vec4 sk_FragColor; uniform vec4 colorGreen; uniform vec4 colorRed; uniform float testArray[5]; vec4 main() { float one = testArray[0]; float two = testArray[1]; float three = testArray[2]; float four = testArray[3]; float five = testArray[4]; return ((one) * (two) + (three)) == 5.0 && ((three) * (four) + (five)) == 17.0 ? colorGreen : colorRed; }