basic processing code

example

void setup()
{
  size(400, 300);  //window size
}

void draw()
{
  background(255, 255, 255); //clear the window with background color (Red, Green, Blue)
  
  strokeWeight(4); // the thickness of line
  line(100, 100, 200, 200);  // draw line from (100, 100) to (200, 200)
  
  fill(255, 0, 0);  // the color of the object
  textSize(20); // the size of text
  int data = 99; 
  text(data, 20, 200); // draw text
}