Create a dash array with holes in it

dash-array-holes.js

const path = new Path.Circle({
    radius: 200,
    strokeColor: 'blue',
    center: view.center,
    strokeCap: 'round',
    strokeWidth: 3
})

const gap = 50
const offsets = []

const updateDashes = () => {
    const dashes = []
    let lastOffset = 0
    
    for (const offset of offsets) {
        dashes.push(offset - lastOffset - gap / 2)
        dashes.push(gap)
        lastOffset = offset + gap / 2
    }
  
    dashes.push(path.length)
    path.dashArray = dashes
}   


function onMouseDown(event) {
    const point = path.getNearestPoint(event.point)
    const offset = path.getOffsetOf(point)
    offsets.push(offset)
    updateDashes()
}