FB script for blogger i need one please

hi guys i need a script for my blogger account
for example a user is going to download my file but first he/she needs to like first then share it to fb or anywhere then after that he/she can now download my file

thats all i need can someone provide that for free?
thanks

just google it bro, there are many scripts for blogger

If you check the facebook documentation they have a method for listening to a user like or action and then executing javascript code.