Create scheduled task and overwrite if already exists

OverwriteScheduleTask.ps1

function Delete-ScheduleTask([string] $taskName)
{
    Write-Host "Delete schedule task for $taskName"
    Unregister-ScheduledTask -TaskName $taskName -Confirm:$false
}

function Create-ScheduleTask([string] $taskName, [string] $startTime, [Int] $interval)
{
    Write-Host "Create schedule task for $taskName"
    $action = New-ScheduledTaskAction -Execute "C:\OctopusApps\app.exe" -Argument $taskName
    $trigger = New-ScheduledTaskTrigger -Once -At $startTime -RepetitionDuration  (New-TimeSpan -Days 3650)  -RepetitionInterval  (New-TimeSpan -Minutes $interval)
    $settings = New-ScheduledTaskSettingsSet 
    $inputObject = New-ScheduledTask -Action $action -Trigger $trigger -Settings $settings 
    Register-ScheduledTask -TaskName $taskName -InputObject $inputObject -User $VMUserName -Password $VMPassword
}

function Overwrite-ScheduleTask([string] $taskName, [string] $startTime, [Int] $interval)
{
    $exists = Get-ScheduledTask | Where-Object {$_.TaskName -like $taskName}
    if($exists)
    {
        Delete-ScheduleTask $taskName
    }
    Create-ScheduleTask $taskName $startTime $interval
}

Overwrite-ScheduleTask "task1" "0:00" 5
Overwrite-ScheduleTask "task2" "0:02" 5
Overwrite-ScheduleTask "task3" "0:04" 5
Overwrite-ScheduleTask "task4" "0:00" 5