35 lines
1.1 KiB
Plaintext
35 lines
1.1 KiB
Plaintext
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& Lesson 8: A random walk
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& Besides colors, what can we get?
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doc! (random) & Check the console to see the documentation
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pc! (random (colors))
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& * random distances
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fd! (random (10, 50)) & walks forward a random amount between 10 and 50
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& * random angles
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rt! (random (-0.25, 0.25)) & turns a random amount between -0.25 and 0.25
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& you can give turtle commands negative values!
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& try giving `fd!` and `bk!` negative values.
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& do it a random number of times:
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let times = random (10, 30)
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& `let` allows us to give names to values; so far we have only named functions
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& let times = random (10, 30)
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& ^^^ `let` is a special form; after
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& ^^^^^ This is the name we're binding
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& ^ `=` goes between the lhs and the rhs
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& ^^^^^^^^^^^^^^^ The value of this expression is what's bound to the name
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& (in this case, it's a random value between 10 and 30)
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& here's our random walk:
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repeat times { & repeat our random number of times
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pc! (random (colors)) & a new random color
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fd! (random (10, 50)) & a new random distance
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rt! (random (-0.3, 0.3)) & a new random turn
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}
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