Last week, I visited my grandparents. (simple past)
While I was driving to their house, it started to rain. (past continuous + simple past)
They were watching a movie when I arrived. (past continuous + simple past)
I helped them with some gardening. (simple past)
While we were planting flowers, a neighbor came to say hello. (past continuous + simple past)
I cooked lunch for everyone. (simple past)
While I was chopping vegetables, my grandmother was telling me stories. (past continuous)
We ate together and talked for hours. (simple past)
Later, I was reading a book while they were resting. (past continuous)
I returned home in the evening, feeling relaxed. (simple past)