import clr
clr.AddReference('ProtoGeometry')
clr.AddReference("RevitServices")
clr.AddReference("RevitAPI")
clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.GeometryConversion)

from Autodesk.DesignScript.Geometry import *

from Autodesk.Revit.DB import *
from Autodesk.Revit.ApplicationServices import *
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

restart = IN[0]
origin = XYZ.Zero
normal = XYZ.BasisZ
pt1 = XYZ(0,0,0);
pt2 = XYZ(20,0,0)

doc = DocumentManager.Instance.CurrentDBDocument
app = doc.Application

# "Start" the transaction
TransactionManager.Instance.EnsureInTransaction(doc)

plane = app.Create.NewPlane(normal, origin)
sketch = SketchPlane.Create(doc, plane)
line = Line.CreateBound(pt1, pt2)
crv = doc.Create.NewModelCurve(line, sketch)

# "End" the transaction
TransactionManager.Instance.TransactionTaskDone()

OUT = crv