@startuml
'figure 1a: Variables'
skinparam monochrome true
skinparam handwritten false
hide class circle
skinparam shadowing false

frame step1 {
note "a_string_variable" as l1

card 140214245924432 [
"Hello, world!"
----
id = 140214245924432
type = str
hash = 8275030067265638305
]

l1 --> 140214245924432 : "refers to"
}

frame step2 {
note "a_string_variable" as l2

card 140214350732528 [
42
----
id = 140214245924432
type = int
hash = 42
]

l2 --> 140214350732528 : "refers to"

}

@enduml
