Make high load of system with provided quantity of processes

load.sh

#!/usr/bin/env bash
count="${1}"
if [[ -z "${1}" ]]; then
  count=20
fi
for ((process=1; process<="${count}"; process++)); do
 (bash -c "while [ 1 ] ; do echo $((13**99)) 1>/dev/null 2>&1; done" &);
done