Geek Tool

I can't work out how to use geektool at all, eurgh that's a tongue twister!

i've found a nice clock that i like, this is the command


Days
cal | sed -e '1d' -e '2p;2p;2p;2p' -e '3d' -e '4d' -e '5d' -e '6d' -e '7d'

Numbers
cal | sed -e '1d' -e '2d' -e '2p;2p;2p;2p' | sed -e '$!N;s/\n/ /' -e '$!N;s/\n/ /' -e '$!N;s/\n/ /' -e '$!N;s/\n/ /' | sed "s/^/ /;s/$/ /;s/ $(date +%e) / $(date +%e | sed 's/././g') /

Can anyone help me put this on my desktop.
also i live in the UK will the weather display correctly?

Thanks in advance