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