Instructions:

To write text to the screen, you may first select the color using the drop down menu, and then type the text you want to appear in the text, then click the "Draw Text" button, and click on the drawing pad where you want the bottom right of the text to appear.To write text multiple times, just click the "Draw Text" button and click on the pad where you want the text to appear.
Click, hold, and drag the mouse to draw lines within the blue drawing area.
To change the color of the line, click on the drop down box to the right of the erase button and choose the color that you want.
To erase the pad, you may select the erase button.
To view code, click (here)