About engine of 2-stroke and 4-stroke

Well, here I will explain about a work cycle of a machine that has a type 2-stroke and 4-stroke .. following explanation :
- Work cycle of 2-stroke engines :
   1.Because the piston moves down to suck the steam explosion at the same time burning gasoline & air for the next explosion .... next, oil side give lubrication to the piston & combustion chamber (hence every 2-stroke bike would smoke).
   2. The piston moves up and compress the gasoline vapor at once drain the rest of the combustion., this is where lies the intake valve to exhaust is a different position, so it can suck as well. (only in 2 machine process has made ​​great energy).
- Work cycle of 4-stroke engines :
   1. The piston moves down, sucking gasoline vapor & air (intake valve opened and exhaust channel closed).
   2. Piston pressure upward for compress a gasoline vapor and air (intake and exhaust valve closed), spark plugs fire and explodes.
   3. Piston down again because of the explosion earlier.
   4. The piston moves upwards again from the rest of the explosive power, while draining the rest of the combustion (intake valve closed and exhaust valve opened) ... trus back to step 1 and so on .. (need 4 processes to create energy) ... Then back again to step 1 and so on .. (need 4 processes to create energy).