Imports github.com/prometheus/client_golang/api github.com/prometheus/client_golang/api/prometheus/v1 github.com/prometheus/common/model gonum.org/v1/plot gonum.org/v1/plot/plotter gonum.org/v1/plot/vg gonum.org/v1/plot/vg/draw Standard library imports context fmt image/color io log math/rand time