OpenLayers 3 doesn't want to draw programmatically a polygon

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I am using OpenLayers 3 and i am trying to draw a polygon using given coordinates , but it doesnt want to draw it .

var source = new ol.source.Vector(); var ring = [ [3139880.24789847, 5961935.332187176], [3179627.5026067616, 5972025.01992082], [3146606.706387566, 5927997.291628557], [3186353.9610958574, 5939615.719927904]]; draw = new ol.interaction.Draw({ source: source, type: 'Polygon', geometryFunction: ring, }); draw.on('drawend', function (e) { var id = guid(); e.feature.featureID = id; e.feature.setProperties({ 'id': id, 'name': 'Polygon', 'description': 'Some values' }) map.removeInteraction(draw); }); map.addInteraction(draw);

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