How to change the font size in Button when writing Unity3D script with JS?

Hello, this is the code I used before, please refer to:

void OnGUI() {

//Create a style for the button

GUI style my button style = new GUI style(GUI . skin . button)；

myButtonStyle.fontSize = 50

//Load and set the font

Font myFont = (Font) resources. Load("Fonts/comic "，type of(Font))；

my button style . font = my font；

//Set the colors of the selected and unselected buttons.

mybuttonstyle . normal . text color = color . red；

mybuttonstyle . hover . text color = color . red；

...

//Use styles in buttons

bool testButtonTwo = GUI。 Button(new Rect( 10， 10，50，50)，" test "，myButtonStyle)；

...

}