1.Construct this pretty flower　
2.Construct the line segments joining (cos(t),0) with (0,sin(t)) as t ranges over [0,2p].
3.Construct the velocity vector field along a constant motion around a circle.
4.Construct this figurer.
5.Construct the line segments joining [cos(t),sin(t)] with [cos(2t),sin(2t)] as tranges over [0,2p].
6.Construct this figure.
7.Construct this graph associated with the logistic equation x ' = ax(1-x)
8.Draw 20 concentric circles as thus.
9.Construct the circles with center at (cos(t),sin(t)) passing through the point 　(1,0) with t ranging over [0,2p].
10.Construct the circles with center at (cos(t),sin(t)) and tangent to the y-axis 　with t ranging over [0,2p].
11.Construct the circles with center at (cos(t),sin(t)) and and passing through 　(2cos(t)/3+cos(2t)/3,2sin(t)/3+sin(2t)/3) with t ranging over [0,2p].
12.Construct this figure.
13.Construct this pattern.
14.Construct the reflections of a light ray inside a square.

> plot ((1+cos(3*t)+sin(3*t)^2),t=0..2*Pi,coords=polar,axes=none,scaling=constrained);