public BiorhythmCanvas(Biorhythm yourBiorhythm) {

        this.yourBiorhythm = yourBiorhythm;

        physicalImage = null;
        sensitivityImage = null;
        intellectualImage = null;

        physicalColor = Color.blue;
        sensitivityColor = Color.red;
        intellectualColor = Color.green;

        borderLineColor = Color.black;
        biorhythmGraphColor = Color.lightGray;
        backgroundColor = Color.white;
        stringColor = Color.black;
 
        resize(width, height);
        setBackground(backgroundColor);
    }