@vs vs
in vec4 position;
in vec4 color0;
in vec4 uv;

out vec4 color;

void main() {
    gl_Position = position;
    color = color0;
    color.x += 0.00000001 * uv.x;
}
@end

@fs fs
in vec4 color;
out vec4 frag_color;

void main() {
    frag_color = color;
}
@end

@program triangle vs fs