Imports github.com/hajimehoshi/ebiten/v2 github.com/hajimehoshi/ebiten/v2/ebitenutil github.com/hajimehoshi/ebiten/v2/vector gitlab.com/gomidi/midi/v2 gitlab.com/gomidi/midi/v2/drivers gitlab.com/gomidi/midi/v2/drivers/rtmididrv Standard library imports bufio encoding/json fmt image image/color log math math/rand os strconv strings sync/atomic time