switch.swift

func makeColor(row: Int, count: Int) -> UIColor {
    switch row {
    case 0:
        return count > 0 ? .gray : .clear
    case 1:
        return count > 60 ? .gray : .clear
    case 2:
        return count > 300 ? .gray : .clear
    case 3:
        return count > 600 ? .gray : .clear
    case 4:
        return count > 1200 ? .gray : .clear
    case 5:
        return count > 3000 ? .gray : .clear
    case 6:
        return count > 6000 ? .gray : .clear
    case 7:
        return count > 9000 ? .gray : .clear
    case 8:
        return count > 12000 ? .gray : .clear
    default:
        return .clear
    }
}