color c1 = #FFCC00;
  int c1x = 50;
  int c1y = 250;
  int c2x = 299;
  int c2y = 1;
   float distance1 = 0;
   float distance2 = 0;
   float distance3 = 0;
   float distance4 = 0;
   int delta1y=1;
   int delta1x=1;
   int delta2y=1;
   int delta2x=1;
   int factor=64;
   float noise=0;
   int w; // width
int h; // height
int count=0;
int [][] world=new int[300][300];
float vvec;
float hvec;
float finalvec;
  BImage b1; 
void setup()
{
  size (300, 300);

  b1 = loadImage("sky.jpg"); 
   
  w = width;
  h = height;

  background(c1);
 
  //cmode = 1; 
  //dmode = 1;
  //cx=300;
  //cy=150;
}
void loop()
{
c1y=c1y+delta1y;
c1x=c1x+delta1x;
c2y=c2y+delta2y;
c2x=c2x+delta2x;

count=count+3;
for (int i=0;i<w;i++) {
  for (int j=0;j<h;j++) {
    //distance1=100*sin(radians(8*(count+dist(mouseX,mouseY,i,j))));
    distance1=100*sin(radians(6*(count+dist(c1x,-100,i,j))));
    distance2=100*sin(radians(8*(count+dist(c2x,400,i,j))));
   distance3=100*sin(radians(7*(count+dist(-50,180,i,j))));
    //distance4=100*sin(radians(8*(count+dist(100,80,i,j))));
    world[i][j]=(int)(distance1+distance2+distance3+distance4); 
    
  }
  }
for (int i=1;i<w-1;i++) {
  for (int j=1;j<h-1;j++) {
    vvec=(world[i][j]-world[i][j-1])-(world[i][j]-world[i][j+1]);
    hvec=(world[i][j]-world[i-1][j])-(world[i][j]-world[i+1][j]);
    //hvec=sqrt(hvec);
    //vvec=sqrt(vvec);
    //set(i,j,color(((world[i][j])%255),0,255));
    //float temp=floor(0+64*abs(atan2(vvec,hvec)));
    float temp=floor(0+64*abs(atan2(vvec,hvec)));
    
    //noise=(floor((i+j+temp)/20)%5)*63;
  set(i,j,b1.pixels[((j-1)*556)+i+int(temp)]);
    //set(i,j,color(temp,temp/2+128,255));
    //if ((hvec>vvec))set(i,j,#9900FF);
    
    
    //if ((hvec<=0)&&(vvec<=0))set(i,j,#FF00FF);
    
  }
  }
  if (count==360)count=0;
   if (c1y==300)delta1y=-1;
   if (c1y==0)delta1y=1;
   if (c1x==500)delta1x=-1;
   if (c1x==-200)delta1x=1;
   if (c2x==300)delta2x=-1;
   if (c2x==0)delta2x=1;
   if (c2y==300)delta2y=-1;
   if (c2y==0)delta2y=1;
  }