glMatrixMode GL_PROJECTION
glLoadIdentity
glOrtho 0 1 0 1 -1 1
glMatrixMode GL_MODELVIEW
glLoadIdentity
glColor 1 0 0
glBegin GL_TRIANGLES
glVertex3 0.0 0.15 2.5
glVertex3 0.75 0.15 -0.5
glVertex3 0.75 0.85 -3.5
glEnd
