void main() {
    float X = gl_FragCoord.x*15./u_resolution.y+u_time+ .9*cos(u_time);
	vec3 Height = vec3(cos(X+cos(gl_FragCoord.x))*.6+.4*sin(gl_FragCoord.x)+.9,
                       cos(X+cos(gl_FragCoord.x+9.))*.2+.21*sin(gl_FragCoord.x+6.)+.5,
                       cos(X+cos(gl_FragCoord.x+7.))*.6+.9*sin(gl_FragCoord.x+4.)+.10);
    vec3 Dist = abs(Height*u_resolution.y-gl_FragCoord.y);
	gl_FragColor = vec4(step(Dist,vec3(15.))+pow(Dist/u_resolution.y*3., vec3(2)),1);
}
     
//created by firstuser at shadergrounds.com