Java Turtle samples

Pentagon zeroth and first order, heptagon zeroth, first and second order:

[applets (scaled, centered)]
[applet 5.0] [applet 5.1] [applet 7.0] [applet 7.1] [applet 7.2]

Turtle code for the pentagons and heptagons above:

repeat 5 [forward 20 repeat 0 [right 360/5] forward 20 repeat 1 [left 360/5]]
repeat 5 [forward 20 repeat 1 [right 360/5] forward 20 repeat 2 [left 360/5]]
repeat 7 [forward 20 repeat 0 [right 360/7] forward 20 repeat 1 [left 360/7]]
repeat 7 [forward 20 repeat 1 [right 360/7] forward 20 repeat 2 [left 360/7]]
repeat 7 [forward 20 repeat 2 [right 360/7] forward 20 repeat 3 [left 360/7]]

The first expression can of course be expressed in a simpler way as "repeat 5 [forward 40 left 72]". The former has been chosen to preserve symmetry in the generating expressions.

Interactive polygons of different orders:

[applet]
[applet]

Get the focus on the applet [possibly by clicking the applet above with the pointing device], then type for interactive usage:

• o: increase order, O: decrease
• s: increase suborder, S: decrease
• r: reset, R: reset suborder only
• n: next, p: previous
• d: double order, h: half

Interactive Turtle applet:

[larger]

[applet]
[applet]

Get the focus on the applet [possibly by clicking the applet above with the pointing device], then type for interactive usage:

• u: penUp, d: penDown
• f: Forward, F: Forward less, b: Back, B: Back less
• l: Left, L: Left less, r: Right, R: Right less
• h: Home
• S: reSet, U: Undo, D: reDo
• +: increase length, -: decrease length, *: double length, /: half length