oneliner

As you move the cursor across the screen, the line increases suddenly in size, flooding the screen.

float x; 

void setup () {
  size (400, 400);
  smooth ();
  x = width/2;
  noCursor ();
}

void  draw () {
 
  
  background (200);
  strokeWeight (1);
  stroke (255);
  if (mouseX > x) {
    x += 2 ; 
  }
  if (mouseX < x) {
    x -= 2;
   
  }
  
  line (x, 200, 20, 200);
  
  line (mouseX, mouseY, mouseX, mouseY );
  line (mouseX, mouseY, mouseX, mouseY );
  
 if (mouseX > width/2) {
   strokeWeight (650);
 
 }
 else {
   strokeWeight (1);
 }
 

 
 if (mouseX > width/2) {
   stroke (100);
   strokeWeight (650);
   
    if (mouseX > x) {
    x += 2 ; 
  }
  if (mouseX < x) {
    x -= 2;
   
   
   line (x, 200, 20, 200);
   line (mouseX, mouseY, mouseX, mouseY);
  }
   
 }
 else {
   stroke (255);
   strokeWeight (650);
 }
}