void mainImage(out vec4 fragColor, in vec2 fragCoord)
{
    vec2 uv = fragCoord.xy / iResolution.xy;

    vec2 p = uv * 2.0 - 1.0;

    p.x *= iResolution.x / iResolution.y;

    float bass = 0.5 + 0.5 * sin(iTime * 2.2);
    float mids = 0.5 + 0.5 * sin(iTime * 3.7);
    float highs = 0.5 + 0.5 * sin(iTime * 7.0);

    p.y += sin(p.x * 6.0 + iTime * 2.0) * bass * 0.15;
    p.x += sin(p.y * 10.0 - iTime * 3.0) * highs * 0.08;

    float wave =
        sin(p.x * 18.0 + iTime) *
        sin(p.y * 12.0 - iTime * 1.5);

    vec3 color = vec3(0.02, 0.04, 0.08);

    color += vec3(0.1, 0.6, 1.0) * wave * bass;
    color += vec3(1.0, 0.2, 0.7) * abs(wave) * mids;

    fragColor = vec4(color, 1.0);
}