#define PI 3.1415926535897932384626
extern float w,h;
extern float t;
vec4 effect(vec4 color,Image text,vec2 pos,vec2 scr_pos){
	float x=scr_pos.x/w;
	float y=scr_pos.y/h;
	float dx,dy;
	vec3 V=vec3(0.);

	dx=0.5+cos(t*3.*0.26)*0.4-x;
	dy=0.5-sin(t*3.*0.62)*0.4-y;
	dx=sqrt(dx*dx+dy*dy);
	V.r=V.r+smoothstep(1.26,0.,dx);

	dx=(0.5+cos(t*3.*0.32)*0.4)-x;
	dy=(0.5-sin(t*3.*0.80)*0.4)-y;
	dx=sqrt(dx*dx+dy*dy);
	V.g=V.g+smoothstep(1.26,0.,dx);

	dx=(0.5-cos(t*3.*0.49)*0.4)-x;
	dy=(0.5+sin(t*3.*0.18)*0.4)-y;
	dx=sqrt(dx*dx+dy*dy);
	V.b=V.b+smoothstep(1.26,0.,dx);

	dx=(0.5+cos(t*0.53)*0.4)-x;
	dy=(0.5-sin(t*0.46)*0.4)-y;
	dx=sqrt(dx*dx+dy*dy);
	V.rg+=vec2(smoothstep(0.626,0.,dx));

	dx=(0.5+cos(t*0.98)*0.4)-x;
	dy=(0.5+sin(t*0.57)*0.4)-y;
	dx=sqrt(dx*dx+dy*dy);
	V.rb+=vec2(smoothstep(0.626,0.,dx));

	dx=(0.5-cos(t*0.86)*0.4)-x;
	dy=(0.5-sin(t*0.32)*0.4)-y;
	dx=sqrt(dx*dx+dy*dy);
	V.gb+=vec2(smoothstep(0.626,0.,dx));

	dx=1.626*max(max(V.r,V.g),V.b);
	return vec4(V/dx,1.);
}