Steam Shovel

This is the poem is for my english class and i can't come up with another stanza can someoone please help me make another stanza.

The Old Steam Shovel

The dinosaurs are not all dead.
I saw one raise its iron head,
To watch me walking down the road
Beyond our house today.
Its jaws were dripping with a load
Of earth and grass that it had cropped.
It must have heard me where I stopped,
Snorted white steam my way,
And stretched its long neck out to see,
And chewed, and grinned quite amiably.
It has to have metaphors