and gate using Nand gate

//This file contains code to implement the functionality of and gate using nand gates. It also contains stimulus / test bench to test the functionality of and gate.

module and1 (y,a,b); 
input a,b;
output y;
wire x;
nand(x,a,b);
nand(y,x,x);
endmodule


module stimulus1;
wire y;
reg a,b;
and1 an(y,a,b);
initial 
begin
$monitor($time,"Output = %b, A = %b, B = %b", y,a,b);
#5 a=1'b0; b=1'b0;
#5 a=1'b1;
#10 a=1'b0; b=1'b1;
#5 a=1'b1;
end
endmodule