// Mouse Signals 
// by REAS <http://reas.com> 

int[] xvals; 
int[] yvals; 
int[] bvals; 
 
void setup() 
{ 
  size(200, 200); 
  framerate(30); 
  xvals = new int[width]; 
  yvals = new int[width]; 
  bvals = new int[width]; 
} 
 
int arrayindex = 0; 
 
void draw() 
{ 
  background(102); 
  
  for(int i=1; i<width; i++) { 
    xvals[i-1] = xvals[i]; 
    yvals[i-1] = yvals[i]; 
    bvals[i-1] = bvals[i]; 
  } 
  // Add the new values to the end of the array 
  xvals[width-1] = mouseX; 
  yvals[width-1] = mouseY; 
  if(mousePressed) { 
    bvals[width-1] = 0; 
  } else { 
    bvals[width-1] = 255; 
  } 
  
  fill(255); 
  noStroke(); 
  rect(0, height/3, width, height/3+1); 
 
  for(int i=1; i<width; i++) { 
    stroke(255); 
    point(i, xvals[i]/3); 
    stroke(0); 
    point(i, height/3+yvals[i]/3); 
    stroke(255); 
    line(i, 2*height/3+bvals[i]/3, i, (2*height/3+bvals[i-1]/3)); 
  } 
}