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
    if(rst) begin
        count <=4'd0;
        pwm_out <= 1'b0;
    end
    else begin
        count <=count+4'd1;
        if (count<duty)
        pwm_out <= 1'b1;
        else
        pwm_out <= 1'b0;
    end
end
endmodule