vlib work
    vmap work work
    vlog cntr_rtl.v
    vsim work.cntr_rtl  
    add wave ld
    add wave rst
    add wave clk
    add wave d
    add wave q
    force -freeze clk 0 0, 1 {50 ns} -r 100
    force rst 1
    force rst 0 10
    force ld 0
    force d 1010
    run 1700
    force ld 1
    run 100
    force ld 0
    run 400
    force rst 1
    run 200
    force rst 0 10
    run 1500