Although the files on bin and obj are not required, I'm leaving them …

…for now, because the required dll is on bin and I've not yet created a .gitignore

examples/buttonPress.ps1

@@ -0,0 +1,32 @@
+Import-Module ./../bin/Debug/netcoreapp2.0/linux-arm/publish/ws281xPowerShell.dll -Force 
+$LedStripSettings = [PSCustomObject]@{
+	NumberOfLeds = 21
+	Brightness = 50
+	Color = [System.Drawing.Color]::Green
+	Speed = "Fast"
+}
+
+while($true)
+{
+	while((Get-GpioPin -Id 26 -PullMode PullUp).Value -eq 'High')
+	{
+
+	}
+	$held = 0
+	while((Get-GpioPin -Id 26 -PullMode PullUp).Value -eq 'Low' -AND $held -lt 10) #lt 10 because each time $held is incremented, 100ms have passed, after 10 iterations, 1 second passed
+	{
+		Start-Sleep -Milliseconds 100
+		++$held
+	}
+
+	if($held -lt 10) #realeased before 1s
+	{
+		$LedStripSettings | Set-LedAccrossStrip
+	}
+	else # it was pressed at least during 1 second ( might still be being pressed)
+	{
+		Write-Host "Button pressed for at least 1 second. "
+		Set-RainbowCycle -NumberOfLeds $LedStripSettings.NumberOfLeds -Brightness $LedStripSettings.Brightness -NumberOfCycles 1
+		Start-Sleep -Milliseconds 200
+	}
+}

src/CmdLets/Set/LedAccrossStripCmdLet.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Management.Automation;  // PowerShell namespace.
+using System.Threading;
+
+namespace WS281x.CmdLets
+{
+
+	[Cmdlet(VerbsCommon.Set, "LedAccrossStrip")]
+	public class LedAccrossStrip : Cmdlet
+	{
+		[Parameter(Mandatory = true, ValueFromPipeline = true, ValueFromPipelineByPropertyName = true, Position = 0)]
+		public int NumberOfLeds {get; set;}
+
+		[Parameter(Mandatory = true, ValueFromPipeline = true, ValueFromPipelineByPropertyName = true, Position = 1)]
+		public byte Brightness { get; set; }
+
+		[Parameter(Mandatory = true, ValueFromPipeline = true, ValueFromPipelineByPropertyName = true, Position = 2)]
+		public Color Color { get; set; }
+
+		[Parameter(Mandatory = false, ValueFromPipeline = true, ValueFromPipelineByPropertyName = true, Position = 5)]
+		[ValidateSet("Slow", "Medium","Fast")]
+		public string Speed { get; set; }
+
+		[Parameter(Mandatory = false)]
+		public SwitchParameter Invert {get;set;}
+
+		public int GpioPin {get; set;}
+
+		//* SPEED!!!!
+		private Dictionary<string,int> _speedTranslation;
+
+		public LedAccrossStrip()
+		{
+			Invert = false;
+			GpioPin = 18;
+
+		}
+
+		protected override void BeginProcessing()
+		{
+			_speedTranslation = new Dictionary<string,int>()
+			{
+				{"Slow", 300},
+				{"Medium", 125},
+				{"Fast", 50},
+			};
+		}
+
+		protected override void	ProcessRecord()
+		{
+			Settings settings = Settings.CreateDefaultSettings();
+            settings.Channel = new Channel(NumberOfLeds, GpioPin, Brightness, Invert, StripType.WS2812_STRIP);
+			WS281x controller = new WS281x(settings);
+
+
+			for(int i = 0 ; i < NumberOfLeds ; ++i)
+			{
+				for(int j = 0 ; j < i ; ++j)
+				{
+					controller.SetLEDColor(j, Color.Empty);
+				}
+				controller.SetLEDColor(i,Color);	
+				controller.Render();
+				Thread.Sleep(_speedTranslation[Speed]);
+			}
+			//"hack". turn the last led of 
+			controller.SetLEDColor(NumberOfLeds-1,Color.Empty);
+			controller.Render();
+			//for some reason it has to be explicitly disposed
+			controller.Dispose();
+		}
+	}
+}

src/CmdLets/Set/RainbowCycleCmdLet.cs

@@ -19,9 +19,11 @@ public class RainbowCycle : Cmdlet
 		public byte Brightness { get; set; }
 
 		[Parameter(Mandatory = false)]
-		public SwitchParameter Invert {get;set;}
+		public SwitchParameter Invert { get; set; }
+
+		[Parameter(Mandatory = false, ValueFromPipeline = true, ValueFromPipelineByPropertyName = true, Position = 2)]
+		public int NumberOfCycles { get; set ;}
 
-		[Parameter(Mandatory = false)]
 		public int GpioPin {get; set;}
 
 		private bool shouldAbort;
@@ -42,38 +44,42 @@ protected override void BeginProcessing()
 
 		protected override void	ProcessRecord()
 		{
+			if(NumberOfCycles == 0)
+			{
+				NumberOfCycles = 1;
+			}
+
 			Settings settings = Settings.CreateDefaultSettings();
             settings.Channel = new Channel(NumberOfLeds, GpioPin, Brightness, Invert, StripType.WS2812_STRIP);
 			WS281x controller = new WS281x(settings);
 			List<Color> colors = GetColors();
-			int currentColorIndex = 0;
-			while(!shouldAbort)
+
+			for(int iterations = 0 ; iterations < NumberOfCycles ; ++iterations)
 			{
-				Color currentColor = colors[currentColorIndex++];
-				for(int i = 0 ; i < NumberOfLeds ; ++i)
+				for(int colorCycle = 0; colorCycle < colors.Count; ++colorCycle)
 				{
-					//Iterate over all LEDs and display the current color
-					controller.SetLEDColor(i,currentColor);
-					controller.Render();
-					Thread.Sleep(25);
-
+					Color currentColor = colors[colorCycle];
+					for(int i = 0 ; i < NumberOfLeds ; ++i)
+					{
+						//Iterate over all LEDs and display the current color
+						controller.SetLEDColor(i,currentColor);
+						controller.Render();
+						Thread.Sleep(25);	
+					}
 				}
-				if(currentColorIndex >= colors.Count)
-				{
-					currentColorIndex = 0;
-				}				
 			}
 		}
 
 		private List<Color> GetColors() => new List<Color>()
 		{
-			Color.FromArgb(0x201000),
-			Color.FromArgb(0x202000),
+			Color.DarkRed,
+			Color.Red,
+			Color.Orange,
+			Color.Yellow,
 			Color.Green,
-			Color.FromArgb(0x002020),
-			Color.Blue,
-			Color.FromArgb(0x100010),
-			Color.FromArgb(0x200010)
+			Color.Lime,
+			Color.Cyan,
+			Color.Blue
 		};
 	}
 }