I want to create a program in ST language with GX Works3. How can I specify digits for a label of a bit device?

For a label where digits are to be specified, set a bit type array as its data type. The following shows an example of when
a global label is used.
– Global label
– Label name: Lamp
– Data type: Bit array of 16 elements
– Device: Y100
– Program: Describe the digit specification of the bit device for a destination of the MOV instruction.
MOV (True, D0, K4Lamp);
M0:=Lamp[0];
M1:=Lamp[1];