Is this what you are trying to do? ( The following demonstrates how to address the screen)
function MakeIt{
# Thank you Sean
# https://ye110wbeard.wordpress.com/2009/12/18/powershell-%E2%80%93-oh-christmas-tree-oh-christmas-tree-%E2%80%93-one-more-change/
clear-host
#Move it all down the line
write-host
# Assign two special characters into an array for potential "LIGHTS"
$starchar = [char][byte]15, "*"
# Number of rows Deep for the Tree- from 2 to whatever fits on the screen, after 30 it gets funky
$Rows = 30
# These variables are for the Bouncing Marquee at the bottom
# Column, number of Columns to move (relative to size of tree)
# and Direction it will move
$BottomRow = $Rows + 4
$BottomColumn = 0
$BottomMaxCol = ($Rows)
$Direction = 1
# Standard console Colours
# Just for fun I added in all the possible Console Foreground Colors
# Delete whichever ones you don't like
$colors = "DarkRed", "DarkBlue", "DarkCyan", "DarkMagenta", "DarkYellow", "Gray", "DarkGray", "Blue", "Green", "Cyan", "Red", "Magenta", "Yellow", "White"
# Get where the Cursor was
$oldpos = $host.ui.RawUI.CursorPosition
# BsponPosh's ORIGINAL Tree building Algorithm 🙂
# None of this would be possible if it weren't for him
Foreach ($r in ($rows .. 1)) {
write-host $(" " * $r) -NoNewline
1 .. ((($rows - $r) * 2) + 1) | ForEach-Object{
write-Host "*" -ForegroundColor Darkgreen -nonewline
}
write-host ""
}
# trunk
# A slight change, an extra row on the stump of the tree
# and Red (Trying to make it look like a brown trunk
write-host $("{0}***" -f (' ' * ($Rows - 1))) -ForegroundColor DarkRed
write-host $("{0}***" -f (' ' * ($Rows - 1))) -ForegroundColor DarkRed
write-host $("{0}***" -f (' ' * ($Rows - 1))) -ForegroundColor DarkRed
$host.ui.RawUI.CursorPosition = $oldpos
# New Addins by Sean "The Energized Tech" Kearney
# Compute the possible number of stars in tree (Number of Rows Squared)
$numberstars = [math]::pow($Rows, 2)
# Number of lights to give to tree. %25 percent of the number of green stars. You pick
$numberlights = $numberstars * .35
# Initialize an array to remember all the "Star Locations"
for ($i = 0; $i -lt $numberlights; $i++) {
$Starlocation += @($host.ui.Rawui.CursorPosition)
}
# Probably redundant, but just in case, remember where the heck I am!
$oldpos = $host.ui.RawUI.CursorPosition
# New change. Create an Array of positions to place lights on and off
foreach ($light in ($numberlights .. 1)) {
# Pick a Random Row
$row = (get-random -Minimum 1 -Maximum (($Rows) + 1))
# Pick a Random Column – Note The Column Position is
# Relative to the Row vs Number of Rows
$column = ($Rows - $row) + (get-random -Minimum 1 -Maximum ($row * 2))
#Grab the current position and store that away in a $Temp Variable
$temppos = $host.ui.rawui.CursorPosition
# Now Build new location of X,Y into $HOST
$temppos.x = $column
$temppos.y = $row
# Store this away for later
$Starlocation[(($light) - 1)] = $temppos
# Now update that "STAR" with a Colour
}
# Repeat this OVER and OVER and OVER and OVER
while ($true) {
# Now we just pull all those stars up and blank em back
# on or off randomly 7 at a time
for ($light = 1; $light -lt 7; $light++) {
# Set cursor to random location within Predefined "Star Location Array"
$host.ui.RawUI.CursorPosition = ($Starlocation | get-random)
# Pick a random number between 1 and 1000
# if 500 or higher, turn it to a light
# Else turn it off
$flip = get-random -Minimum 1 -Maximum 1000
if ($flip -gt 500) {
# Write a Random "star character" on the screen
# in a Random Foreground Color from defined sets
write-Host ($starchar | get-random) -ForegroundColor ($colors | get-random) -nonewline
} else {
write-host "*" -Foregroundcolor DarkGreen -nonewline
}
}
# Remember where we are
$temppos = $oldpos
# Set a position for the row and Column
$oldpos.X = $BottomColumn
$oldpos.Y = $BottomRow
# update the console
$host.ui.Rawui.CursorPosition = $oldpos
# Bump up the column position based upon direction
$BottomColumn = $BottomColumn + $Direction
# Ok this was a BAD way to do it but it works for
# Christmas. If we hit the right side change
# Direction to backwards. If we hit the left side
# Change direction forwards
If ($BottomColumn -gt $Rows) { $Direction = -1 }
If ($BottomColumn -lt 1) { $Direction = 1 }
# Print greeting. Space must be before and after to avoid
# Trails. Output in Random Colour
write-host " Happy Holidays Powershell " -ForegroundColor ($colors | get-random)
# End of the loop, keep doin' in and go "loopy!"
}
}
MakeIt
\_(ツ)_/
