size 400,400
xrange -10,10
yrange -10,10
grid 2,2,grey
strokecolor red
onclick
latex -6,5,rac{1}{2}+ rac{\pi}{2}
strokecolor blue
onclick
latex -3,5,rac{1}{3}+ rac{\pi}{3}
strokecolor green
onclick
latex 0,5,rac{1}{4}+ rac{\pi}{4}
strokecolor orange
onclick
latex 3,5,rac{1}{5}+ rac{\pi}{6}
