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1) $h (hash) so used in your file(should be standard file?).

2) the module should be then included in task side code where the $h o
+f this module will be read.

Some concerns:
1) are you suggesting reading this : "task=B pretask=makeAServerdown p
+osttask=checkBServer" from some text file. or hardcoding in code? I a
+m assuming text file for now.
...
print('just a block for fun: ' . $i . "\n");
}