Ladybugs, JS Fundamentals

function solve(input) {
    let fieldSize = input[0];
    let ladybugPositions = input[1].split(' ');

    // Create Field
    let createField = [];
    for (let f = 0; f < fieldSize; f++) {
        createField.push(0);
    }
    // Put the Ladybugs on the field (starting positions)
    for (let s = 0; s < ladybugPositions.length; s++) {
        if (ladybugPositions[s] >= 0 && ladybugPositions[s] < fieldSize) {
            createField.splice(ladybugPositions[s], 1, 1);
        }
    }

    for (let i = 2; i < input.length; i++) {
        // create directions
        let command = input[i].split(' '); // split the current input into 3 parts
        let direction = command[1]; // 1 - left or right
        let travelFrom = Number(command[0]); // 2- starting position
        let travelTo = Number(command[2]); // 3 - ending position

        if (travelFrom < 0 || travelFrom > fieldSize) {
            continue;
        }
        // negative steps reversal
        if (travelTo < 0) {
            travelTo = Math.abs(travelTo);
            if (direction === "right") {
                direction = 'left';
            } else if (direction === "left") {
                direction = 'right';
            }
        }
        // Move Right
        if (direction === "right" && createField[travelFrom] === 1) {
            travelTo = travelFrom + travelTo;
            // first remove remove the bug
            createField[travelFrom] = 0;
            // then if the spot is taken
            if (createField[travelTo] !== 0) {
                // fly until you find one
                for (let x = 0; x < fieldSize; x++) {
                    if (createField[travelTo] !== 0) {
                        travelTo++
                    }
                    if (createField[travelTo] === 0) {
                        break;
                    }
                }
            }
            // land on the free one
            if (createField[travelTo] === 0) {
                let ladybugIsMoving = createField.splice(travelTo, 1, 1);
            }
            // Move left
        } else if (direction === "left" && createField[travelFrom] === 1) {
            travelTo = travelFrom - travelTo;
            // first remove remove the bug
            createField[travelFrom] = 0;
            // if the spot is taken
            if (createField[travelTo] !== 0) {
                // fly until you find one
                for (let x = 0; x < fieldSize; x++) {
                    if (createField[travelTo] !== 0) {
                        travelTo--;
                    }
                    if (createField[travelTo] === 0) {
                        break;
                    }
                }
            }
            // land on the free one
            if (createField[travelTo] === 0) {
                let ladybugIsMoving = createField.splice(travelTo, 1, 1);
            }
        }
    }
    console.log(createField.join(' '));
}

solve([3, '0 1', '0 right 1', '2 right 1'])

solve([5, '3', '3 left 2', '1 left -2'])

solve([3, '0 1 2', '0 right 1', '1 right 1', '2 right 1'])