module sycrest(clock, red, amber, green);
input clock;
output reg red, amber, green;
parameter on=1, off=0, red_tics=350, amber_tics=30,green_tics=200;
always
begin
red=on;
light(red,red_tics);
green=on;
light(green,green_tics);
amber=on;
light(amber,amber_tics);
end
task light ;
output color;
input[31:0] tics;
begin
repeat(tics) @(posedge clock);
color=off;
end
endtask
endmodule |
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