change global variables to var from let

sketch.js

@@ -7,12 +7,12 @@ env.allowLocalModels = false;
 
 // GLOBAL VARIABLES
 
-let PREPROMPT = `Please continue the story, and fill any [MASK] with your own words:`
+var PREPROMPT = `Please continue the story, and fill any [MASK] with your own words:`
 // let PREPROMPT = `Please complete the phrase and fill in any [MASK]: `
-let PROMPT_INPUT = `The [BLANK] has a job as a [MASK] but...` // a field for writing or changing a text value
-let pField // an html element for the prompt
-let outText // an html element for the results
-let blanksArray = [] 
+var PROMPT_INPUT = `The [BLANK] has a job as a [MASK] but...` // a field for writing or changing a text value
+var pField // an html element for the prompt
+var outText // an html element for the results
+var blanksArray = [] 
 // a list for all the variable inputs, e.g. ["woman", "man", "non-binary person"]