Giga will ask you to type in the text to be written and give the colour. Pressing the spacebar whilst the program is running changes the background. Pressing the up arrow makes the text bolder; the down arrow makes it thinner. If it takes too long, you can always activate turbo mode (hold shift + click green flag)!
It has been changed so giga will show you how to write the text you want to write... assuming you are an alien and the keyboard is human...