define :vector [
    init: method [x,y][
        this\x: x
        this\y: y
    ]

    add: method [that :vector][
        to :vector @[this\x + that\x, this\y + that\y]
    ]

    sub: method [that :vector][
        to :vector @[this\x - that\x, this\y - that\y]
    ]

    mul: method [n :integer][
        to :vector @[this\x * n, this\y * n]
    ]

    div: method [n :integer][
        to :vector @[this\x // n, this\y // n]
    ]

    string: method [][
        render "(|this\x|, |this\y|)"
    ]
]

; test our vector object
a: to :vector [5 7]
b: to :vector [2 3]
print [a '+ b '= a + b]
print [a '- b '= a - b]
print [a '* 11 '= a * 11]
print [a '/ 11 '= a / 2]