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.

Statements and Comments.

Statements are the elements that make up programs. The ";" (semi-colon) symbol is used to end statements. It is called the "statement terminator." Comments are used for making notes to help people better understand programs. A comment begins with two forward slashes ("//").


// The size function is a statement that tells the computer 
// how large to make the window.
// Each function statement has zero or more parameters. 
// Parameters are data passed into the function
// and are used as values for telling the computer what to do.
size(640, 360);

// The background function is a statement that tells the computer
// which color (or gray value) to make the background of the display window 
background(204, 153, 0);