Thanks man. I haven't understood clearly where you get the " RipeMD-160 614bd7ef80e1105fc86895d339eff49a9c56bdad a few more bytes and opcode ''

I understand your difficulty in learning ... I have been through this too.

Follow the steps in this image to calculate the RIPEMD - 160.

This great blog will help you create transactions;
https://klmoney.wordpress.com/bitcoin-dissecting-transactions-part-2-building-a-transaction-by-hand/

If you have any other questions ... feel free to ask. Wink