Weather Front Simulation

Cold Front- The cold front air went under the warm air, pushing the warm up. Forming a cloud and making it rain. Making it rain.
Warm Front- The warm front came and started pushing the cold air back and going over the cold air. Making it rain.
Stationary Front- The warm air and cold air go forward until they reach each other and push each other back and forth till the cloud forms. making it rain.
Occluded Front- The cold air came and pushed against the warm and cool air creating clouds and making it rain or snow.
Which type of front occurred this week to bring the cold weather and then snow?- The Occluded Front.

Cloud Diagram