The back and forth motion observed within ACL 3.2 becomes more organised within ACL 3.4. The person is able to place objects in a horizontal row and stack them in a vertical column. Objects can also be taken in and out of containers. The objects that capture their attention need to be close to the basic primary and secondary colours plus black and white; brown is often included too. The actions are repetitive and habitual, manual actions. They are not goal-directed.