SCREEN
Sets a background color.
CALL GP.RGBBKG(R, G, B)
| Parameter | Description |
| R | Number in the range 0-255 representing the red component of the color |
| G | Number in the range 0-255 representing the green component of the color |
| B | Number in the range 0-255 representing the blue component of the color |
Sets a foreground color of the symbol
CALL GP.RGBCHR(R, G, B)
| Parameter | Description |
| R | Number in the range 0-255 representing the red component of the color |
| G | Number in the range 0-255 representing the green component of the color |
| B | Number in the range 0-255 representing the blue component of the color |