Some wordplay below on a string of words
that stand for what might arise sequentially
while one practises mindfulness of Buddha:
…念佛念佛念佛念杂念杂念杂念佛念佛念佛念佛念佛…
念佛: Mindfulness of Buddha
念杂: Mindfulness of stray thoughts
杂念: Stray mindfulness
佛念: Buddha mindfulness