Shape;
BoundingRectangle(4,4);
// This draws a shape consisting of 4 arrows pointing outward.

pt0.x = left + 4*grid;
pt0.y = top -4*grid;

pt1.x = left + 4*grid;
pt1.y = top -2*grid;

pt2.x = left +3*grid;
pt2.y = top -2*grid;

pt3.x = midx;
pt3.y = top;

pt4.x = right -3*grid;
pt4.y = top -2*grid;

pt5.x = right -4*grid;
pt5.y = top -2*grid;

pt6.x = right -4*grid;
pt6.y = top -4*grid;

pt7.x = right -2*grid;
pt7.y = top -4*grid;

pt8.x = right -2*grid;
pt8.y = top -3*grid;

pt9.x = right;
pt9.y = midy;

pt10.x = right -2*grid;
pt10.y = bottom +3*grid;

pt11.x = right -2*grid;
pt11.y = bottom +4*grid;

pt12.x = right -4*grid;
pt12.y = bottom +4*grid;

pt13.x = right -4*grid;
pt13.y = bottom +2*grid;

pt14.x = right -3*grid;
pt14.y = bottom +2*grid;

pt15.x = midx;
pt15.y = bottom;

pt16.x = left +3*grid;
pt16.y = bottom +2*grid;

pt17.x = left +4*grid;
pt17.y = bottom +2*grid;

pt18.x = left +4*grid;
pt18.y = bottom +4*grid;

pt19.x = left +2*grid;
pt19.y = bottom +4*grid;

pt20.x = left +2*grid;
pt20.y = bottom +3*grid;

pt21.x = left;
pt21.y = midy;

pt22.x = left +2*grid;
pt22.y = top -3*grid;

pt23.x = left +2*grid;
pt23.y = top -4*grid;

pt24.x = left +4*grid;
pt24.y = top -4*grid;

Polygon(25);
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