Shader Library

uniform float u_time;

void main()

{

vec3 color = vec3(0.0);

float line = smoothstep(0.0, 1.0, abs(v_uv.x - 0.5));

color = abs(sin(vec3(line) * u_time * 130.0));

color = mix(vec3(0.0), color, line);

gl_FragColor = vec4(color, 1.0);

}