shapes:

    "_dripper":
        prismels:
            : "tri" (0 0 0 0)  0 f eval(1 + 1)
            : "tri" (1 0 0 0)  0 f eval(1 + 9)
            : "tri" (0 0 1 0)  0 f eval(1 + 9)
            : "tri" (1 0 0 0)  2 f eval(1 + 7)

    "dripper":
        animation: cycle 4
        shapes:
            : "_dripper" ( 0 2 3 0) 6 f  1 ( 0 1)
            : "_dripper" ( 0 2 1 0) 0 f  0 ( 1 1)
            : "_dripper" ( 2 2 3 0) 6 f  1 ( 2 1)
            : "_dripper" ( 2 2 1 0) 0 f  0 ( 3 1)