size 400,400
xrange -10,10
yrange -10,10
grid 1,1,grey
linewidth 3
fillcolor black
strokecolor yellow
slider 0,2*pi,400,30,angle degree,Rotate arrow
arrow 0,0,8,0,8,red
filled
fillcolor orange
fillpatter hatch
opacity 255,80
arc 0,0,8,8,0,0,red
