The first step towards completing the project is to get the skeleton code and Makefile Lab46 has a command you can run called grabit, it can be used by typing the command, followed by the course designation, followed by the project in this case it would be

 grabit cprog gtf0 

You can make custom colors in C with commands from the libgd library so do this specify the integer variable that will have the color assigned to it

int black = 0;

then using the gdImageColorAllocate command, specify the intensity of each color, red green and blue, and reassign the output to the color

                         image  red   green blue
black = gdColorAllocate (image, 0x00, 0x00, 0x00);

Syntax for drawing a graphics line

gdImageFill (image, x1, y1, x2, y2, color);

Syntax for drawing a graphics line

gdImageRectangle (image, topleftX, topleftY, bottomrightX, bottomrightY