how to simulate a combined braking system in simulink

Good day guys,

I am new to simulink. Just moved from other simulation system to Simulink. I am trying to simulate the braking pressure distribution to front and rear brake which would be decided by the combined braking system logic. The logic is based general CBS system. When only front brake is applied only front brake is applied, when only rear brake is applied both front and rear is applied by a ratio of front being half of rear. when both brakes are applied, it still applies front to rear pressure ratio of 1:2. now the problem that i am facing is that I am sure how to start. And I can't find enough help on this kind of system online either.

Any help or guidance would really be appreciated. Thank you.