30. PWM with 4-bit Resolution

How do you plan to solve it?

/*Write your code here*/
module pwm4_basic( input clk,
                   input rst,
                   input [3:0] duty,
                   output reg pwm_out );

        reg [3:0] cnt;
        always@(posedge clk or posedge rst) begin
        if (rst) begin
        cnt <= 0;
        pwm_out <= 0;
        end else begin
        cnt <= cnt + 1'd1; 
        if (cnt < duty)
            pwm_out <= 1;
        else
             pwm_out <=0;
        end;
        end;
        


endmodule