This is a generative drawing tool, where the mouse is used for drawing. While mouse is pressed your brush is lifted. You can choose from several brushes from the drop down menu, adjust their sizes with the "SIZE 1" and "SIZE 2" sliders, and choose colours with the colour picker. There are several backgrounds to start your drawing from. If you change the window size refresh the page.
My aim with this program was for it to assist in quickly creating effective textures and drawings, eliminating the pressure that comes with starting work on a blank white page. Take advantage of its unrefined nature and its limits. The tool is best thought of as a springboard for ideas and compositions.