var positions = [5, 6, 8, 72, 76]
var calculateNewPositions = function(positions, minDelta) {
var newPositions = [0]
positions.slice(1).forEach(function(pos, index) {
var delta = positions[index + 1] - positions[index]
newPositions.push(newPositions[index] + Math.max(delta, minDelta))
})
return newPositions
}
calculateNewPositions(positions, 10)