Ladybugs failing

function solve(input) {
    const field = []
    const size = input[0]
    for (let i = 0; i < size; i++) {
        field[i] = 0
    }
    const ladybugs = input[1].split(" ").map(Number)
    ladybugs.map(index => field[index] = 1)

    let commands = input.slice(2)
    const length = commands.length


    let command = ""
    let bugIndex = 0
    let targetIndex = 0
    let dir = ""
    let fly = 0

    for (let i = 0; i < commands.length; i++) {
        command = commands[i].split(" ")
        bugIndex = Number(command[0])
        dir = command[1]
        targetIndex = Number(command[2])

        if (dir === "right") {
            fly = bugIndex + targetIndex
        }
        if (dir === "left") {
            fly = bugIndex - targetIndex
        }

        if (fly > size - 1) {
            field.splice(bugIndex, 1, 0)
            continue
        }

        while (fly <= size - 1) {
            field.splice(bugIndex, 1, 0)
            // BUG INSIDE
            if (field[fly] === 1) {
                fly += targetIndex
                continue
            }
            // PLACING BUG
            else {
                field[fly] = 1
                break
            }
        }
    }

    console.log(field.join(" "))
}