$cnt=0; $progress=0
address of $progress=SCALAR(0x19fc970)
$cnt=0; $progress=20
address of $progress=SCALAR(0x19fe710)
$cnt=0; $progress=40
address of $progress=SCALAR(0x1cfdb0c)
$cnt=0; $progress=60
address of $progress=SCALAR(0x1d13fc4)