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] count ;
always @(posedge clk) begin
    count <= count + 1'b1;
    if (rst) begin
        count <= 4'b0;
        pwm_out <= 1'b0;
    end
    else if (count < duty) pwm_out <= 1'b1;
    else pwm_out <= 1'b0;
end
endmodule