This example is for Processing 3+. If you have a previous version, use the examples included with your software. If you see any errors or have suggestions, please let us know.

Points and Lines.

Points and lines can be used to draw basic geometry. Change the value of the variable 'd' to scale the form. The four variables set the positions based on the value of 'd'.

 
int d = 70;
int p1 = d;
int p2 = p1+d;
int p3 = p2+d;
int p4 = p3+d;

size(640, 360);
noSmooth();
background(0);
translate(140, 0);

// Draw gray box
stroke(153);
line(p3, p3, p2, p3);
line(p2, p3, p2, p2);
line(p2, p2, p3, p2);
line(p3, p2, p3, p3);

// Draw white points
stroke(255);
point(p1, p1);
point(p1, p3); 
point(p2, p4);
point(p3, p1); 
point(p4, p2);
point(p4, p4);