2 questions about BGI in MinGW

AFAIK you cannot use BGI with MinGW. BGI is the graphics library provided by Turbo C/C++ (are you using WinBGIm[^]?).

[Update]
Move the square to the right:

1. Erase the square at current position {x,y}.
2. Update position {x,y}->{x+dx, y}.
3. Delay for some time (e.g. calling Sleep() function).
4. Repeat from point 1.

You may use the rectangle[^] function to draw the square.


BTW What do you mean with "spin a circle"?
[/Update]