Whether you specify a color number, string value or integer value for the color value, you must specify the keyword color. For example, you can specify:

 

color "red" key Stop at position 40 50

 

color 1 key A  at position 20 20    # 1 is the color

                                    # number

                                    # corresponding to

                                    # the color red. 

color UserChoice key A              # UserChoice can be a

                                    # variable or

                                    # constant

                                    # representing a

                                    # keyword or number.

 

You can also use the keywords red, blue, and so on; for example:

 

red key Stop at position 50 50