1#property description Black sine wave from left to right.
2#property frequency 1
3
4void main(void) {
5    vec2 normCoord = (uv - 0.5) * aspectCorrection;
6    float x = (normCoord.x + normCoord.y) * 15. + iTime * iFrequency * 3.;
7    fragColor = texture(iInput, uv);
8    fragColor *= 1.0 - iIntensity * (0.5 * sin(x) + 0.5);
9}
10