V5 Addressable LEDs

yes, it was added, very basic but you could build a more complex class around the provided functionality.

from the VSCode help/stubs

# ----------------------------------------------------------
AddressableLedList = Union[List[Color], List[Color.DefinedColor]]

class AddressableLed:
    '''### Addressable led class

    #### Arguments:
        port : The 3wire port to use for the addressable led strip

    #### Returns:
        An instance of the AddressableLed class

    #### Examples:
        addr1 = AddressableLed(brain.three_wire_port.a)
    '''
    def __init__(self, port):
        self._index = port

    def value(self):
        return 0

    def type(self):
        return 0

    def clear(self):
        '''### clear all addressable led to off

        #### Arguments:
            None

        #### Returns:
            None

        #### Examples:
            addr1.clear()
        '''
        pass

    def set(self, data:AddressableLedList, offset:vexnumber=0):
        '''### Set the addressable led strip to provided values

        #### Arguments:
            data : An list of Color values
            offset (optional) : index of led to start at, 0 based

        #### Returns:
            None

        #### Examples:
            addr1 = AddressableLed(brain.three_wire_port.a)\\
            pix = [Color(0x800000),Color(0x008000),Color(0x000080)]\\
            addr1.set(pix)
        '''
        pass

you could extend

class AdvancedAddressableLed(AddressableLed):
    pass

    def all_red(self):
        self.set([Color(0x800000)] * 64)

    def all_green(self):
        self.set([Color(0x008000)] * 64)

    def all_blue(self):
        self.set([Color(0x000080)] * 64)

    def rotate(self, data):
        data[:] = data[1:] + data[:1]
        self.set(data)

a=AdvancedAddressableLed(brain.three_wire_port.a)

# 60 led colors
c=[Color(0xC00000),
   Color(0x800000),
   Color(0x400000),
   Color(0x300000),
   Color(0x200000),
   Color(0x100000)
  ] * 10

def test1():
    while True:
        a.rotate(c)
        sleep(100)

test1()