30. PWM with 4-bit Resolution

How do you plan to solve it?

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

    always @(posedge clk) begin
        if (rst) begin
            cnt <= 0;
            pwm_out <= 0;
        end else begin
            cnt <= cnt+1;
        end

        if (cnt < duty) begin
            pwm_out <= 1;
        end else begin
            pwm_out <= 0;
        end
    end
endmodule