Homework: TETRIS (2)

1. Extend your previous homework about TETRIS.
2. Design a function void draw_block(int n, int y0, int x0) which will draw the n^th block at position (y0, x0) in its default color.
3. Design a function void erase_block(int n, int y0, int x0) which will draw the n^th block at position (y0, x0) in COLOR_PAIR(0), which effectively erase the block.
4. In your main program, use a loop to demonstrate these two fucntions are working correctly.

   
       for (i=1; i<=7; i++)
       {
           for (int y=0; y<20; y++)
           {
               draw_block(i, y, i);
               refresh();
               usleep(300000);
               erase_block(i, y, i);
           }
       }