vlib work
vlog  +acc  "../blink.v"
vlog  +acc  "../blink_TB.v"
vlog  +acc  "/opt/cad/Xilinx/verilog/src/glbl.v"
vsim -t 1ps   -L xilinxcorelib_ver -L unisims_ver  blink_TB_v glbl
view wave
do wave.do
#add wave *
add wave /glbl/GSR
view structure
view signals
run 15ms