How to represent RZ signal code grafic

Hey everyone. I need help represeting a grafic for a RZ signal (that means that the grafic when it haves value 1 it goes up to y=3 and half way point it goes down to the x axis. The 0 it is the same but it is -3)

Heres the code that i have to a user insert the 1´s and 0´s

bny = input('Insira o codigo a codificar: ' ,'s');

idx = ismember(bny,'01');

assert(all(idx),'Input must contain only 0s and 1s, but it contains %s',bny(~idx))

fprintf('Your code is: %s\n',bny)

V = [-3,3];

n = V(bny-'/')