procedure main
go 10
lt 90
go 100
go 150
rt 90
go 50
rt 90
go 250
lt 90
go 25
go 20
lt 60
go 250
lt 30
go 10
go 15
rt 90
go 50
go 20
go 8
rt 90
go 275
go 5
rt 90
go 280
go 20
go 10
go 8
go 5
end