pen gold, 50 fd 150 rt 180, 75 lt 90, 100 rt 90, 50 rt 180, 150
You can draw a wide or narrow track with turns or wiggles
by using pen, rt, lt,
and fd:
pen gold, 50 uses a gold-colored pen that
draws a line 50 pixels wide.
fd 150 moves the turtle (drawing a line with
a pen) forward by 150 pixels.
rt 90 pivots the turtle, without moving,
right by 90 degrees.
rt 180, 75 turns the turtle 180 degrees
to the right, while tracing out a circle of radius 75.
lt 90, 100 turns the turtle 90 degrees
to the left, while tracing out a circle of radius 100.
The diagrams below can be used to help plan curves.
await loadscript '/lib/angles.cs', defer()
jumpto 0, -25
label 'lt 90,50',
fontSize: '120%'
fontFamily: 'Source Code Pro'
jumpto -48, 25
plan ->
css { turtleRotation: '-90deg' }
label '50 pixels',
fontSize: '80%'
home()
jumpto 25, 0
pen gold, 10
lt 90, 50
r = 100
pen silver, 2
for turn in [rt, lt]
for d in [30..360] by 30
turn 30, r
turn 90; fd 5
jump 0, 20
remember = direction()
turnto 0
label d
turnto remember
jump 0, -20
bk 5; turn 270
jumpto r, 0
label 'rt',
fontSize: '200%'
fontFamily: 'Source Code Pro'
jumpto -r, 0
label 'lt',
fontSize: '200%'
fontFamily: 'Source Code Pro'
home()
pen gray, 3
rt 48, r
pen path
fd 2; rt 150
for [1..3]
fd 10; rt 120
fill gray
home()
pen gray, 3
lt 48, r
pen path
fd 2; rt 150
for [1..3]
fd 10; rt 120
fill gray
home()
await loadscript '/lib/angles.cs', defer()
jumpto 0, -25
label 'rt 90,50',
fontSize: '120%'
fontFamily: 'Source Code Pro'
jumpto 48, 25
plan ->
css { turtleRotation: 90 }
label '50 pixels',
fontSize: '80%'
home()
jumpto -25, 0
pen gold, 10
rt 90, 50
jumpto 0, -25 label 'lt 60,100', fontSize: '120%' fontFamily: 'Source Code Pro' jumpto 30, 0 pen gold, 10 lt 60, 100
jumpto 0, -25 label 'lt 180,30', fontSize: '120%' fontFamily: 'Source Code Pro' jumpto 30, 0 pen gold, 10 lt 180, 30
label 'rt 360,70', fontSize: '120%' fontFamily: 'Source Code Pro' jumpto -70, 0 pen gold, 10 rt 360,70
jumpto 0, -25 label 'rt 180,30', fontSize: '120%' fontFamily: 'Source Code Pro' jumpto -30, 0 pen gold, 10 rt 180, 30
jumpto 0, -25 label 'rt 60,100', fontSize: '120%' fontFamily: 'Source Code Pro' jumpto -30, 0 pen gold, 10 rt 60, 100