Donut

local A, B = 0, 0
local chars = ".,-~:;=!*#$@"

while task.wait(0.05) do
    local b = table.create(1760, " ")
    local z = table.create(1760, 0)
    
    for j = 0, 6.28, 0.07 do
        for i = 0, 6.28, 0.02 do
            local sin_i, cos_j = math.sin(i), math.cos(j)
            local sin_A, sin_j = math.sin(A), math.sin(j)
            local cos_A, cos_i = math.cos(A), math.cos(i)
            local cos_B, sin_B = math.cos(B), math.sin(B)

            local h = cos_j + 2
            local D = 1 / (sin_i * h * sin_A + sin_j * cos_A + 5)
            local t = sin_i * h * cos_A - sin_j * sin_A

            local x = math.floor(40 + 30 * D * (cos_i * h * cos_B - t * sin_B))
            local y = math.floor(12 + 15 * D * (cos_i * h * sin_B + t * cos_B))
            local o = x + 80 * y + 1
            local N = math.floor(8 * ((sin_j * sin_A - sin_i * cos_j * cos_A) * cos_B - sin_i * cos_j * sin_A - sin_j * cos_A - cos_i * cos_j * sin_B))

            if y < 22 and y > 0 and x > 0 and x < 80 and D > (z[o] or 0) then
                z[o] = D
                local char_idx = math.clamp(N + 1, 1, #chars)
                b[o] = string.sub(chars, char_idx, char_idx)
            end
        end
    end

    local output = "\n"
    for k = 1, 1760 do
        output = output .. (k % 80 == 0 and "\n" or b[k])
    end
    
    print(output)
    A += 0.1
    B += 0.05
end