float radius = 100.0;

int X, Y;

int nX, nY;

int delay = 16;

 

 

void setup(){

  size( 1000, 1000 );

  strokeWeight( 10 );

  frameRate( 20 );

  X = width / 2;

  Y = width / 2;

  nX = X;

  nY = Y;  

}

 

// Main draw loop

void draw(){

  

  radius = radius + sin( frameCount / 40 );

  

  // Track circle to new destination

  X+=(nX-X)/delay;

  Y+=(nY-Y)/delay;

  

  // Fill canvas dark gray, black oblivion

  background( #312D2D );

  

  // Set fill-color to white

  fill(255);

  

  // Set stroke-colour white

  stroke(255); 

  

  // Draw the circle

  ellipse( X, Y, radius, radius );                  

}

 

 

// Set circle's next destination

void mouseMoved(){

  nX = mouseX;

  nY = mouseY;  

}