SharePoint List

#Create a list demo by deleting existing list
$spWeb = Get-SPWeb -Site "http://w15-sp"
$spList = $spWeb.Lists["demo"]

if($spList -ne $null){
#delete list demo if already present
$listguid = $spList.ID;
$spLIst.Lists.Delete($listguid);
$spWeb.Update();
}
#New list Demo
$templateType = [Microsoft.SharePoint.SPListTemplateType]::DocumentLibrary
$spWeb.Lists.Add("Demo","Demo Document Library",$templateType);
$spWEb.Update()
#Adding column
$spList = $spWeb.Lists["demo"]
#Title,FieldType,REquiredIndicator
$spList.Fields.Add("Color",[Microsoft.SharePoint.SPFieldType]::Text,1);
$spList.Update();
$spWeb.Update();