docs: Turtle.StepSpiral ( Fixes #122 )

Adding examples

Author: StartAutomating

Examples/EndlessStepSpiral.turtle.ps1

@@ -0,0 +1,16 @@
+Push-Location $PSScriptRoot
+$myName = $MyInvocation.MyCommand.Name -replace '\.turtle\.ps1$'
+$turtle = turtle @('StepSpiral',16, 90, 16, 20, 'rotate',90 * 4) | 
+    Set-Turtle -Property PatternTransform -Value @{scale=1} |
+    # set-turtle -property Fill -value 'currentColor' |
+    # set-turtle -property FillRule -value 'evenodd' |
+    Set-Turtle -Property PatternAnimation -Value ([Ordered]@{
+        type = 'scale'    ; values = 0.66,0.33, 0.66 ; repeatCount = 'indefinite' ;dur = "23s"; additive = 'sum'
+    }, [Ordered]@{
+        type = 'rotate'   ; values = 0, 360 ;repeatCount = 'indefinite'; dur = "41s"; additive = 'sum'
+    }, [Ordered]@{
+        type = 'translate';values = "0 0","42 42", "0 0";repeatCount = 'indefinite';additive = 'sum';dur = "117s"
+    })    
+    
+$turtle | save-turtle -Path "./$myName.svg" -Property Pattern
+Pop-Location

Types/Turtle/StepSpiral.ps1

@@ -9,6 +9,12 @@
     By default, this creates an outward spiral.
 
     To create an inward spiral, use a negative StepSize or StepCount.
+.EXAMPLE
+    turtle StepSpiral save ./StepSpiral.svg
+.EXAMPLE
+    turtle @('StepSpiral',3, 120, 'rotate',120 * 3) save ./StepSpiralx3.svg
+.EXAMPLE
+    turtle @('StepSpiral',3, 90, 'rotate',90 * 3) save ./StepSpiralx4.svg
 #>
 param(
 # The length of the first step