Journey to Silius Collision box viewer

--Journey To Silius Collision Box Viewer
--For FCEUX 2.2.x
--Author Pasky

local function draw_axis(x,y)
    gui.line(x,y-4,x,y+4)
    gui.line(x-4,y,x+4,y)
end

local function player()
    local life = 0x00B0
    local x = memory.readbyte(0x0506)
    local y = memory.readbyte(0x0507)
end

local function Collision()
    local x
    local y
    local xrad
    local yrad
    memory.registerexec(0xE72A,function()
        x = memory.readbyte(0x0016)
        x2 = memory.getregister("A")
        y = memory.readbyte(0x0017)
        y2 = memory.readbyte(0x0002)
        xrad = memory.readbyte(0x0000)
        yrad = memory.readbyte(0x0001)
        draw_axis(x,y)
        draw_axis(x2,y2)
        gui.box(x+xrad,y+yrad,x-xrad,y-yrad,"FF000035","#FF0000FF")
    end)
end

while true do
    player()
    Collision()
    emu.frameadvance()
end