# Shape Primitives

The basic shape primitive functions are triangle(), rect(), quad(), ellipse(), and arc(). Squares are made with rect() and circles are made with ellipse(). Each of these functions requires a number of parameters to determine the shape's position and size.

``````/**
* Shape Primitives.
*
* The basic shape primitive functions are triangle(),
* with rect() and circles are made with ellipse(). Each
* of these functions requires a number of parameters to
* determine the shape's position and size.
*/

size(640, 360);
background(0);
noStroke();

fill(204);
triangle(18, 18, 18, 360, 81, 360);

fill(102);
rect(81, 81, 63, 63);

fill(204);
quad(189, 18, 216, 18, 216, 360, 144, 360);

fill(255);
ellipse(252, 144, 72, 72);

fill(204);
triangle(288, 18, 351, 360, 288, 360);

fill(255);
arc(479, 300, 280, 280, PI, TWO_PI);

``````

This example is for Processing 4+. 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.