How can I generate these signals in Simulink?

The signals are :

Tb is bit time = 0.001s Basically. First is square wave with 50% duty cycle and second is with 100 percent duty cycle. I tried using Pulse Generator, it is not giving me negative output and it does not let me choose 100 for duty cycle.

How can I do this in Simulink?

Answer 1

[Birdman]

See the attached model. Hope it helps.

[Bhargava Reddy Banala]

Thank you for the file.

[Bhargava Reddy Banala]

When I run this model, I am getting signals up to Tb. After I am getting zero. The signals above are periodic with period Tb. What should I change to get the signal after Tb instead of zero.