flow chart as bpmn

graph LR
    subgraph pool
        direction LR
        subgraph earn
            direction LR
            Sa0((start))
            Sa1(work)
            Sa2((receive wage))

            Sa0-->Sa1
            Sa1-->Sa2
            Sa2-->Sa1
        end

       Sa2-.->S0

        subgraph spend
            direction LR
            S0((start))
            S2(Go shopping)
            S3{How much money will I spend?}
            S1(save for later)
            S4(buy Laptop)
            S5(buy iPhone)
            S6(buy Car)
            S7{ }
            S8((end))
            S9{ }
            S10(pay)

            S0-->S2
            S2 --> S3
            S3-->| =0 | S1
            S3-->| <= 1k | S4
            S3 -->| > 1k| S5
            S3 -->| >10k | S6
            S1-->S9
            S4-->S7
            S5-->S7
            S6-->S7
            S7-->S10
            S10-->S9
            S9-->S8
        end
    end