dataTable.addRows([
['1', 'Order 1','#EE7752',new Date(2017, 9, 15, 8, 0, 0), new Date(2017, 9, 15, 9, 30, 0)],
['1', 'Order 2','#EE7752', new Date(2017, 9, 15, 9, 30, 0), new Date(2017, 9, 15, 15, 30, 0)],
['1', 'Order 3','#EE7752', new Date(2017, 9, 15, 16, 0, 0), new Date(2017, 9, 15, 17, 0, 0)],
['1', 'Order 4','#EE7752', new Date(2017, 9, 15, 12, 30, 0), new Date(2017, 9, 15, 14, 0, 0)],
['1', 'Order 5','#EE7752', new Date(2017, 9, 15, 14, 30, 0), new Date(2017, 9, 15, 16, 0, 0)],
['1', 'Order 6','#EE7752', new Date(2017, 9, 15, 16, 30, 0), new Date(2017, 9, 15, 17, 0, 0)],
['2', 'Order 1','#EE7752', new Date(2017, 9, 15, 8, 0, 0), new Date(2017, 9, 15, 9, 30, 0)],
['2', 'Order 2','#EE7752', new Date(2017, 9, 15, 10, 0, 0), new Date(2017, 9, 15, 15, 30, 0)],
['2', 'Order 3','#EE7752', new Date(2017, 9, 15, 16, 0, 0), new Date(2017, 9, 15, 17, 0, 0)],
['2', 'Order 4','#EE7752', new Date(2017, 9, 15, 12, 30, 0), new Date(2017, 9, 15, 14, 0, 0)],
['2', 'Order 5','#EE7752', new Date(2017, 9, 15, 14, 30, 0), new Date(2017, 9, 15, 16, 0, 0)],
['2', 'Order 6','#EE7752', new Date(2017, 9, 15, 16, 30, 0), new Date(2017, 9, 15, 17, 0, 0)],
['3', 'Order 1','#EE7752', new Date(2017, 9, 15, 8, 0, 0), new Date(2017, 9, 15, 9, 30, 0)],
['3', 'Order 2','#EE7752', new Date(2017, 9, 15, 10, 0, 0), new Date(2017, 9, 15, 15, 30, 0)],
['3', 'Order 3','#EE7752', new Date(2017, 9, 15, 16, 0, 0), new Date(2017, 9, 15, 17, 0, 0)],
['3', 'Order 4','#EE7752', new Date(2017, 9, 15, 12, 30, 0), new Date(2017, 9, 15, 14, 0, 0)],
['3', 'Order 5','#EE7752', new Date(2017, 9, 15, 14, 30, 0), new Date(2017, 9, 15, 16, 0, 0)],
['3', 'Order 6','#EE7752', new Date(2017, 9, 15, 16, 30, 0), new Date(2017, 9, 15, 17, 0, 0)]
])
Somethings like this