Serlio 1
| 1 | Construct 2 equilateral triangles with one common edge and define the points A, B, C, D, 1, 2, 3 and 4. |
| 2 | Construct the circular arcs from 1 to 2 with center B and from 3 to 4 with center A. |
| 3 | Construct the circular arcs from 1 to 4 with center C and from 2 to 3 with center D. |
| 4 | Drag point 1 change the dimensions of the oval. |
