Attributes that can be changed using the change_attr function

obj_type	attributes
image	scale
sound	not available
line	line_width, lineJoin, miterLimit, angle, line_length, line_color
rect	line_width, lineJoin, miterLimit, fill_color, line_color, width, height
cross	line_width, lineJoin, miterLimit, line_color, line_length
circle	line_width, lineJoin, miterLimit, fill_color, line_color, radius
text	line_width, lineJoin, miterLimit, font, text_color, content, text_space