Draw the graph of the function f(x) = 2 * ⌈x⌉ for the domain -2 < x < 1 .

When  0<x<1 → ⌈x⌉=1  →f(x)=2
when   x=0   → ⌈x⌉=0  →f(x)=0      
when -1 <x<0 → ⌈x⌉=0  →f(x)=0
when   x= -1  → ⌈x⌉= -1  →f(x)= -2  
when  -2<x<-1 → ⌈x⌉= -1  →f(x)= -2