// Blink an LED provided an input clock
/* module */
module top (hwclk, mosi, led1, led2, led3, led4, led5, led6, led7, led8, clkout , out);
   /* I/O */
   input hwclk;
   input mosi;
   output led1;
   output led2;
   output led3;
   output led4;
   output led5;
   output led6;
   output led7;
   output led8;
	 output clkout;
	 output out;
	 wire 	clkout;
	 
   /* Counter register */
   reg [31:0] counter = 32'b0;
   reg [8:0] 	shiftreg = 9'b1;

   /* LED drivers */
   assign led1 = shiftreg[0];
   assign led2 = shiftreg[1];
   assign led3 = shiftreg[2];
   assign led4 = shiftreg[3];
   assign led5 = shiftreg[4];
   assign led6 = shiftreg[5];
   assign led7 = shiftreg[6];
   assign led8 = shiftreg[7];

	 assign clkout = hwclk;
	 assign out = shiftreg[8];

   /* always */
   always @ (negedge hwclk)
		 begin
    		shiftreg = (shiftreg << 1) + mosi;
		 end

endmodule