**testshapes_16x32**or

**testshapes_32x32**example sketch, which will test every drawing element available (again, you may need to edit the pin numbers for the 32x32 panel).

// draw a pixel in solid white matrix.drawPixel(0, 0, matrix.Color333(7, 7, 7));

// fix the screen with green matrix.fillRect(0, 0, 32, 16, matrix.Color333(0, 7, 0));

// draw a box in yellow matrix.drawRect(0, 0, 32, 16, matrix.Color333(7, 7, 0));

**drawLine**procedure will draw a line in any color you want, we used this to draw a big X

// draw an 'X' in red matrix.drawLine(0, 0, 31, 15, matrix.Color333(7, 0, 0)); matrix.drawLine(31, 0, 0, 15, matrix.Color333(7, 0, 0));

**drawCircle**or fill a circle with

**fillCircle**. The first two arguments are the center point, the third argument is the radius in pixels, finally the color to use.

// draw a blue circle matrix.drawCircle(7, 7, 7, matrix.Color333(0, 0, 7)); // fill a violet circle matrix.fillCircle(23, 7, 7, matrix.Color333(7, 0, 7));

**fillScreen** allows you to fill the entire screen with a single color:

// fill the screen with 'black' matrix.fillScreen(matrix.Color333(0, 0, 0));

**Serial**. You can use

**setCursor**which is where the top left pixel of the first character will go, this can be anywhere but note that text characters are 8 pixels high by default. Next

**setTextSize**lets you set the size to 1 (8 pixel high) or 2 (16 pixel high for really big text!), you probably want just to stick with 1 for now. Lastly we can set the color of the text with

**setTextColor**. Once this is all done, we can just use

**print('1')**to print the character "1".

// draw some text! matrix.setCursor(1, 0); // start at top left, with one pixel of spacing matrix.setTextSize(1); // size 1 == 8 pixels high // print each letter with a rainbow color matrix.setTextColor(matrix.Color333(7,0,0)); matrix.print('1'); matrix.setTextColor(matrix.Color333(7,4,0)); matrix.print('6'); matrix.setTextColor(matrix.Color333(7,7,0)); matrix.print('x'); matrix.setTextColor(matrix.Color333(4,7,0)); matrix.print('3'); matrix.setTextColor(matrix.Color333(0,7,0)); matrix.print('2'); matrix.setCursor(1, 9); // next line matrix.setTextColor(matrix.Color333(0,7,7)); matrix.print('*'); matrix.setTextColor(matrix.Color333(0,4,7)); matrix.print('R'); matrix.setTextColor(matrix.Color333(0,0,7)); matrix.print('G'); matrix.setTextColor(matrix.Color333(4,0,7)); matrix.print("B"); matrix.setTextColor(matrix.Color333(7,0,4)); matrix.print("*");