float t,d,pi=3.1416, b, h,v,m=100,n=100,s=99,fa=2,fb=4;
color c;
int  x,y,aa=96,ab=96;
void setup() { 
  size(200, 200); 
  frameRate(60); 
} 

void draw(){
t-=0.1;
x=0;
background(0);
while (x<200){
	y=0;
	while (y<200){
	d=(m-x)*(m-x)+(n-y)*(n-y);
	b=atan2(x-m, y-n);	
        c=color(64+(aa*sin(d*pi*fa/(s*s)+b+t))-ab*sin(d*pi*fb/(s*s)-b+t));
	set(x,y,c);
	y+=1;
	}
	x+=1;}
}

void mouseDragged(){
    if (mouseButton==LEFT){
        fa+=(mouseX-pmouseX)*0.1;
        aa+=(mouseY-pmouseY);    
    }
    if (mouseButton==RIGHT | (keyPressed == true && keyCode == SHIFT)){
        fb+=(mouseX-pmouseX)*0.1;
        ab+=(mouseY-pmouseY);    
    }        
}