What is it called when every couple of bricks theres a cluster of bricks on house? Fad in the 60's?

Just bought a house that was built in the 60s. Exterior is brick, but every few bricks theres a cluster of bricks sticking out. What is this called? o

Just bought a house that was built in the 60's. Exterior is brick, but every few bricks there's a cluster of bricks sticking out. What is this called?

or:Just bought a house that was built in the 60's. Exterior is brick, but every few bricks there's a cluster of bricks sticking out. What is this called?

Tags:brick,