Wolfram Function Repository
Instantuse addon functions for the Wolfram Language
Function Repository Resource:
Display an Lsystem
ResourceFunction["LSystemPlot"][rules,axiom,n,delta] displays the Lstring for the nth iteration of the list rules, starting with the string axiom after n iterations with an angle delta. 
Four steps for Koch quadratic rules:
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Get just the resulting string after only one step:
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Continuously modify the angle:
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Grid for named fractals:
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Select a gradient color function:
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Convert to a BSplineCurve:
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Make a tessellation:
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Go to 3D:
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Wolfram Language 11.3 (March 2018) or above
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