Javascript: ESRI ArcGIS API - zoom in/out functionality

Looking for a simple javascript-based map with a few markers. ---Requirements--- 1.) Use Javascript ESRI ArcGIS version 4.10 [login to view URL] 2.) A few markers with squares, circles and gradients. 3.) When zooming-out, the squares and circles should appear smaller in size. Please see the attached photos for a sample of the requirements. If interested this project, please mention how much experience of ESRI ArcGIS and the length of duration for the completion of this task. Thank you.