Linkage

Construct the Peaucellier's linkage.
Construct a linkage to draw the ellipse.
Construct a linkage to draw the lemniscate as thus:
Construct another linkage to draw the lemniscate as thus:
Construct a linkage to draw the cardioid as thus:
Construct a linkage to draw the nephroid
Construct a linkage to draw the deltoid.
Construct a linkage to draw the astroid.