Adding blink example

Examples/blink/logic/blink.v

@@ -0,0 +1,18 @@
+`timescale 1ns / 1ps
+module blink(clk, reset, led);
+  parameter     B = (7);
+
+  input            clk, reset;
+  output           led;
+
+  reg [24:0]  counter;
+  always @(posedge clk) begin
+    if (reset)
+      counter <= {25{1'b0}};
+    else
+      counter <= counter + 1;
+  end 
+  assign led = counter[24];
+
+endmodule
+