vec2 N(float angle){
    return vec2(sin(angle), cos (angle));
}

void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
    // Normalized pixel coordinates (from 0 to 1)
    vec2 uv = (fragCoord-.5*iResolution.xy)/ iResolution.y;
    vec2 mouse = iMouse.xy/iResolution.xy;
    uv *= 0.5;

    vec3 col = vec3(0);

    uv.x = abs(uv.x);
    uv.y += tan((5./6.)*3.1415)*.5;

    vec2 n = N((5./6.)*3.1415);
    float d = dot(uv-vec2(.5, 0), n);
    uv -= n*max(0., d)*2.;


    n = N(mouse.y*(2./3.)*3.1415);

    float scale = 1.;
    uv.x += .5;
    for (int i=0; i<5; i++){
        uv *= 3.;
        scale *= 3.;
        uv.x -= 1.5;

        uv.x = abs(uv.x);
        uv.x -= .5;
        uv -= n*min(0., dot(uv,n))*2.;


    }


   d = length( uv - vec2( clamp(uv.x, -1., 1.),0));
   col += smoothstep( 1./iResolution.y, .0, d/scale);
   uv /= scale;
   col += texture(iChannel0, uv*2.-iTime*.03).rgb;

    // Output to screen
    fragColor = vec4(col,1.0);
}