set "_psc=powershell"
set "EchoRed=%_psc% write-host -back Black -fore Red"
set "EchoGreen=%_psc% write-host -back Black -fore Green"
set "EchoBlack=%_psc% write-host -back Black -fore Black"
set "ELine=echo: & %EchoRed% ==== ERROR ==== &echo:"