In order to become a law, an idea goes through several steps:
First, the idea is drafted into an actual bill; then, the bill is introduced to at House or Senate desk so that the bill number is assigned, in order for it to be referred to a committee.
Afterwards, a hearing is held and the committee recommends ordering the reported bill. Then, the bill is placed on the House or Senate calendar. Finally, if the bill passes in one House, it is moved on to the other House of Congress.
So, the correct order would be: 6 - 1 - 8 - 5 - 2 - 7 - 4 - 3