A free verse poem does not have a specific pattern. The poet can usually do what they please with the poem because there are no rules. The poet will chose the length of a line or sometimes cut a line short because he/she feels it should be like that. The poet will usually describe a subject with figurative language. The poet can make the own rules for their own poem.
After the Sea-Ship by Walt Whitman
After the Sea-Ship—after the whistling winds;
After the white-gray sails, taut to their spars and ropes,
Below, a myriad, myriad waves, hastening, lifting up their necks,
Tending in ceaseless flow toward the track of the ship.