// Two forward slashes are used to denote a comment.
// All text on the same line is a part of the comment.
// There must be no spaces between the slashes. For example,
// the code "/ /" is not a comment and will cause an error
// If you want to have a comment that is many
// lines long, you may prefer to use the syntax for a
// multiline comment

/* 
  A forward slash followed by an asterisk allows the 
  comment to continue until the opposite 
*/ 
 
// All letters and symbols that are not comments are translated 
// by the compiler. Because the following lines are not comments, 
// they are run and draw a display window of 200 x 200 pixels 
size(200, 200); 
background(102);