Hi, I joined as I wanted to draw a single dot.
A line x,y,x,y draws nothing.
A line x,y,x,y+1 draws two dots vertically.
A line x,y+1,x+1,y+1 draws two dots horizontally,( like a capital L with the line above.)
So change the dot color to match the background, then all that is left is the desired dot at x,y