left 511, 118 //  -1
wait 30s
left 488, 100
wait 30s
left 514, 529
wait  //  -1
left 511, 168 //  -2
wait 30s
left 488, 160
wait 30s
left 514, 529
wait  //  -2
left 511, 231 //  -3
wait 30s
left 488, 223
wait 30s
left 514, 529
wait  //  -3
left 511, 294 //  -4
wait 30s
left 488, 286
wait 30s
left 514, 529
wait  //  -4
left 511, 357 //  -5
wait 30s
left 488, 349
wait 30s
left 514, 529
wait  //  -5
left 511, 420 //  -6
wait 30s
left 488, 412
wait 30s
left 514, 529
wait  //  -6
left 511, 483 //  -7
wait 30s
left 488, 475
wait 30s
left 514, 529
wait  //  -7