glMatrixMode GL_PROJECTION
glLoadIdentity
glOrtho 0 1 0 1 -1 1
glMatrixMode GL_MODELVIEW
glLoadIdentity
glColor 1 1 1
glBegin GL_TRIANGLES
glVertex2 0.25 0.25
glVertex2 0.75 0.25
glVertex2 0.75 0.75
glEnd
