This is a script virus

Add-Type -AssemblyName PresentationFramework

$icons = @(
    '[ERROR] ',
    '[WARNING] ',
    '[INFO] ',
    '[QUESTION] '
)

while ($true) {
    $icon = Get-Random -InputObject $icons
    Write-Host "$icon This is a prank message!" -ForegroundColor Yellow
    Start-Sleep -Milliseconds 300
}