this will require a simple switch and if used scripting. when i finished moving and get my desktop set up i will look into it. but only because your from my home town, i was born and raised there lived in holgate, so unless one of the veterans beat me to it i will have a shot. but could be a week, but i suggest have a look at the script commands switch and the raise water, it is quite simple to do its just a while since i have been on x10 having moving and things. anyway have a mess around, you can open all scripts in notebook. and experiment, its like having a new game without instructions, the more you press buttons explore and test the more you learn and understand. but as i said if you play about for a week or 2 then if no joy i will of sorted out my desktop and will have a go unless another person sorts it sooner
an unquenchable thirst for knowledge of game creation!!!