[@ 0.000ms] print: 0
[@ 500.000ms] print: 1
[@ 1000.000ms] print: 2
[@ 1500.000ms] print: 3
[@ 2000.000ms] print: 4
[@ 2500.000ms] print: 5
[@ 9000.000ms] print: 6
[@ 10000.000ms] print: 7
[@ 11000.000ms] print: 8
