okay so i need to have a motor turn on when a basic limit switch N.O. changes from the LOW state to HIGH, and have to motor stay on after the switch goes back to LOW.
A basic motor momentary start with memory, not sure how to write this in the arduino language used to simple ladder loggic.
would appreciate a sample. thanks for your time and have a nice day 
You can achieve that with a simple latching relay - isn't that cheaper and simpler than using an Arduino?