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) begin
if(rst) begin
    cnt <= 0;
    pwm_out <= 0;
end
else begin
    cnt <= cnt +1;
    pwm_out <= (cnt<duty)?1:0;
end
end

endmodule