1. A point is defined by set of X and Y coordinates, Point(x,y)
  2. A line neeeds at least two points point(x1,y1), point(x2, y2)
  3. To draw a line open a sketchbook 
size(500, 375);
smooth();
background(255, 204, 0);
line(10,10, 200,200);
strokeWeight(5);
point(50,50);