Help modeling system with two switches

I am having trouble to model a system. Can anyone help? I have two enumerations say {left,none,right} (switches s1 and s2)

When s2 is right and s1 is right, increase output with rate r1 up to a maximum of L.

When s2 is right and s1 is left, decrease output with rate r1 up to a minimum of -L.

When s2 or s1 is none, hold output

when s2 is left, make output go down to zero with rate +-r2.

I would also like to model it with only 1 integrator if possible.