grid.glsl

void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
	vec2 p = (2.0*fragCoord.xy-iResolution.xy)/iResolution.y;

    // width
	float wi = 0.5 + 0.3*cos( iTime + 2.0 );

    vec2 g = abs(p - wi * round(p/wi));
	float d = min(g.x, g.y);
    
    vec3 col = vec3(1.0) - sign(d)*vec3(0.1,0.4,0.7);
	col *= 1.0 - exp(-3.0*abs(d));
	col *= 0.8 + 0.2*cos(120.0*d);
	col = mix( col, vec3(1.0), 1.0-smoothstep(0.0,0.015,abs(d)) );

    fragColor = vec4(col,1.0);
}