// Do File for simulation on an Inverter with input signal 'in'
//Prepare the simulation
reset state -discard
del traces -all
del forces -all

set radix binary

//Add traces through do file instead of manually
add trace in
add trace out 
//Set the input as a clock. 
set clock period 20
force in 0 0 -r     //signal in starts from 0.
force in 1 10 -r   //in will rise to 1 After 10ns
 
//run the simulation for the given time (in nsec)
run 50