I'm imagining an oblong frame thing like my granny used to have (?)
Rope bridle on each end (ie rope from each of 2 corners joining together above the frame and a single rope from there (same at other end). Your single rope from one end goes up and over one sheave of a double pulley block on the ceiling and then down to the cleat. The rope from the other end goes up and over a single sheave pulley on the ceiling and then along and over the second sheave of the double pulley and down to the cleat.
If you only want one rope at the cleat tie the two together and cut off one of the free ends.
That's a complete work of my imagination! :wink:
If only my memory was good enough to remember the rigging details of my granny's "pulley"! :?