The circular color below the top edge of the canvas are the color palette for the pencil. The user must click on one of the color before drawing an image on the canvas. The black, blue, green, red and yellow will be used to set the pencil color and The clear button will be used to crear the screen;the user can use the pencil to draw on the canvas. The plus(+) and minus(-) are used increase and decrease the thickness of the pencil which ranges from zero to 10 (thickest).
