[require]
GLSL >= 1.10

[vertex shader]
void main()
{
	gl_Position = vec4(0,0,0,0);
}

[fragment shader]
uniform vec4 u[1];
void main()
{
	vec4 c = vec4(0,0,0,0);
	for (int i = 0; i < 2; ++i)
		c += u[i];
	gl_FragColor = c;
}