Why are you sure that your loop is ever even entered? You got a condition that is wrong at the start of the loop:

for ($i=0; $i >= 1000; $i++) {
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This is why it is much much better to use foreach to loop over arrays instead of using the C-style loop. Or, if you want to just look at an array, use Data::Dumper or a simple print statement:

print "@Bxcoord";
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