Amazfit Watch faces

Hello. I have Xiaomi Amazfit bip. can you explain how to add image ? "Background": {
"Image": { #Image
"X": 0,
"Y": 0,
"ImageIndex": 0
},
"Preview": {
"X": 0,
"Y": 0,
"ImageIndex": 1
}
"FrontImage": { #not much of a use. You can delete this.
"X": 0,
"Y": 0,
"ImageIndex": 2
},

I know ...