Ramp up and ramp down

Hello Folks,

I want to have the below scenario in my script :

a) Every 5 secs ramp up 10 users and perform transaction and reach max users of 50 count.

b) Hit the page with max user count for the next 1 minute.

Ramp down the users for every 5 secs 10 users

Please help me how such scenario is possible in Gatling


Rajat Singh